21121100002122 has 16 divisors (see below), whose sum is σ = 42242270709600. Its totient is φ = 7040354883152.

The previous prime is 21121100002073. The next prime is 21121100002193. The reversal of 21121100002122 is 22120000112112.

It is a super-2 number, since 2×21121100002122² (a number of 27 digits) contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1439488 + ... + 6656900.

It is an arithmetic number, because the mean of its divisors is an integer number (2640141919350).

Almost surely, 2^{21121100002122} is an apocalyptic number.

21121100002122 is an abundant number, since it is smaller than the sum of its proper divisors (21121170707478).

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

21121100002122 is a wasteful number, since it uses less digits than its factorization.

21121100002122 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5892117.

The product of its (nonzero) digits is 32, while the sum is 15.

Adding to 21121100002122 its reverse (22120000112112), we get a palindrome (43241100114234).

The spelling of 21121100002122 in words is "twenty-one trillion, one hundred twenty-one billion, one hundred million, two thousand, one hundred twenty-two".