21110001211012 has 12 divisors (see below), whose sum is σ = 42220002422080. Its totient is φ = 9047143376136.

The previous prime is 21110001211001. The next prime is 21110001211141. The reversal of 21110001211012 is 21011210001112.

It is a happy number.

21110001211012 is an admirable number.

It is a super-2 number, since 2×21110001211012² (a number of 27 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 21110001210983 and 21110001211001.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 376964307312 + ... + 376964307367.

Almost surely, 2^{21110001211012} is an apocalyptic number.

It is an amenable number.

21110001211012 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

21110001211012 is a wasteful number, since it uses less digits than its factorization.

21110001211012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 753928614690 (or 753928614688 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 13.

Adding to 21110001211012 its reverse (21011210001112), we get a palindrome (42121211212124).

The spelling of 21110001211012 in words is "twenty-one trillion, one hundred ten billion, one million, two hundred eleven thousand, twelve".