21111132212212 has 96 divisors (see below), whose sum is σ = 42863886487296. Its totient is φ = 8911171584000.

The previous prime is 21111132212161. The next prime is 21111132212221. The reversal of 21111132212212 is 21221223111112.

It is a congruent number.

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, 550165387 + ... + 550203757.

It is an arithmetic number, because the mean of its divisors is an integer number (446498817576).

Almost surely, 2^{21111132212212} is an apocalyptic number.

It is an amenable number.

21111132212212 is an abundant number, since it is smaller than the sum of its proper divisors (21752754275084).

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

21111132212212 is a wasteful number, since it uses less digits than its factorization.

21111132212212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39497 (or 39495 counting only the distinct ones).

The product of its digits is 192, while the sum is 22.

Adding to 21111132212212 its reverse (21221223111112), we get a palindrome (42332355323324).

The spelling of 21111132212212 in words is "twenty-one trillion, one hundred eleven billion, one hundred thirty-two million, two hundred twelve thousand, two hundred twelve".