2101222212120 has 96 divisors (see below), whose sum is σ = 6987785547600. Its totient is φ = 547295083776.

The previous prime is 2101222212097. The next prime is 2101222212139. The reversal of 2101222212120 is 212122221012.

It is a happy number.

2101222212120 is a `hidden beast` number, since 210 + 1 + 22 + 221 + 212 + 0 = 666.

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 = 2101222212093 and 2101222212102.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 67853455 + ... + 67884414.

Almost surely, 2^{2101222212120} is an apocalyptic number.

2101222212120 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2101222212120 is an abundant number, since it is smaller than the sum of its proper divisors (4886563335480).

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

2101222212120 is a wasteful number, since it uses less digits than its factorization.

2101222212120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 135737929 (or 135737922 counting only the distinct ones).

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

Adding to 2101222212120 its reverse (212122221012), we get a palindrome (2313344433132).

It can be divided in two parts, 210122 and 2212120, that added together give a palindrome (2422242).

The spelling of 2101222212120 in words is "two trillion, one hundred one billion, two hundred twenty-two million, two hundred twelve thousand, one hundred twenty".