21121022411112 has 128 divisors (see below), whose sum is σ = 56966195664000. Its totient is φ = 6487136501760.

The previous prime is 21121022411107. The next prime is 21121022411131. The reversal of 21121022411112 is 21111422012112.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 691819464 + ... + 691849992.

It is an arithmetic number, because the mean of its divisors is an integer number (445048403625).

Almost surely, 2^{21121022411112} is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 21121022411112, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (28483097832000).

21121022411112 is an abundant number, since it is smaller than the sum of its proper divisors (35845173252888).

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

21121022411112 is a wasteful number, since it uses less digits than its factorization.

21121022411112 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34451 (or 34447 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 21.

Adding to 21121022411112 its reverse (21111422012112), we get a palindrome (42232444423224).

The spelling of 21121022411112 in words is "twenty-one trillion, one hundred twenty-one billion, twenty-two million, four hundred eleven thousand, one hundred twelve".