21112120211012 has 24 divisors (see below), whose sum is σ = 38554078248000. Its totient is φ = 10096705257056.

The previous prime is 21112120210981. The next prime is 21112120211057. The reversal of 21112120211012 is 21011202121112.

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, 2129762 + ... + 6838137.

It is an arithmetic number, because the mean of its divisors is an integer number (1606419927000).

Almost surely, 2^{21112120211012} is an apocalyptic number.

It is an amenable number.

21112120211012 is a deficient number, since it is larger than the sum of its proper divisors (17441958036988).

21112120211012 is a wasteful number, since it uses less digits than its factorization.

21112120211012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8993515 (or 8993513 counting only the distinct ones).

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

Adding to 21112120211012 its reverse (21011202121112), we get a palindrome (42123322332124).

The spelling of 21112120211012 in words is "twenty-one trillion, one hundred twelve billion, one hundred twenty million, two hundred eleven thousand, twelve".