21111010022012 has 36 divisors (see below), whose sum is σ = 38291782246536. Its totient is φ = 10183625699520.

The previous prime is 21111010022009. The next prime is 21111010022017. The reversal of 21111010022012 is 21022001011112.

It is a super-2 number, since 2×21111010022012² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21111010022017) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1912418 + ... + 6773430.

Almost surely, 2^{21111010022012} is an apocalyptic number.

It is an amenable number.

21111010022012 is a deficient number, since it is larger than the sum of its proper divisors (17180772224524).

21111010022012 is a wasteful number, since it uses less digits than its factorization.

21111010022012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4862366 (or 4862335 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 14.

Adding to 21111010022012 its reverse (21022001011112), we get a palindrome (42133011033124).

The spelling of 21111010022012 in words is "twenty-one trillion, one hundred eleven billion, ten million, twenty-two thousand, twelve".