2122221212010 has 128 divisors (see below), whose sum is σ = 5675020738560. Its totient is φ = 564350649408.

The previous prime is 2122221211987. The next prime is 2122221212039. The reversal of 2122221212010 is 102121222212.

It is a happy number.

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

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 316604319 + ... + 316611021.

It is an arithmetic number, because the mean of its divisors is an integer number (44336099520).

Almost surely, 2^{2122221212010} is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2122221212010, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2837510369280).

2122221212010 is an abundant number, since it is smaller than the sum of its proper divisors (3552799526550).

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

2122221212010 is a wasteful number, since it uses less digits than its factorization.

2122221212010 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9809 (or 9803 counting only the distinct ones).

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

Adding to 2122221212010 its reverse (102121222212), we get a palindrome (2224342434222).

The spelling of 2122221212010 in words is "two trillion, one hundred twenty-two billion, two hundred twenty-one million, two hundred twelve thousand, ten".