21211110122012 has 24 divisors (see below), whose sum is σ = 39106015280640. Its totient is φ = 10038903404400.

The previous prime is 21211110122003. The next prime is 21211110122063. The reversal of 21211110122012 is 21022101111212.

It is a super-2 number, since 2×21211110122012² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 117472364 + ... + 117652787.

It is an arithmetic number, because the mean of its divisors is an integer number (1629417303360).

Almost surely, 2^{21211110122012} is an apocalyptic number.

It is an amenable number.

21211110122012 is a deficient number, since it is larger than the sum of its proper divisors (17894905158628).

21211110122012 is a wasteful number, since it uses less digits than its factorization.

21211110122012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 235126361 (or 235126359 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 17.

Adding to 21211110122012 its reverse (21022101111212), we get a palindrome (42233211233224).

The spelling of 21211110122012 in words is "twenty-one trillion, two hundred eleven billion, one hundred ten million, one hundred twenty-two thousand, twelve".