2102221212120 has 192 divisors, whose sum is σ = 6850713355200. Its totient is φ = 559076981760.

The previous prime is 2102221212109. The next prime is 2102221212131. The reversal of 2102221212120 is 212121222012.

It is a happy number.

2102221212120 is a `hidden beast` number, since 210 + 2 + 221 + 21 + 212 + 0 = 666.

It is an interprime number because it is at equal distance from previous prime (2102221212109) and next prime (2102221212131).

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 2102221212093 and 2102221212102.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 218680434 + ... + 218690046.

It is an arithmetic number, because the mean of its divisors is an integer number (35680798725).

Almost surely, 2^{2102221212120} is an apocalyptic number.

2102221212120 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2102221212120, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3425356677600).

2102221212120 is an abundant number, since it is smaller than the sum of its proper divisors (4748492143080).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

2102221212120 is a wasteful number, since it uses less digits than its factorization.

2102221212120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11210 (or 11203 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 18.

Adding to 2102221212120 its reverse (212121222012), we get a palindrome (2314342434132).

The spelling of 2102221212120 in words is "two trillion, one hundred two billion, two hundred twenty-one million, two hundred twelve thousand, one hundred twenty".