21121012001112 has 32 divisors (see below), whose sum is σ = 52864143274800. Its totient is φ = 7032122230784.

The previous prime is 21121012001017. The next prime is 21121012001137. The reversal of 21121012001112 is 21110021012112.

It is a happy number.

It is a super-2 number, since 2×21121012001112² (a number of 27 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 21121012001091 and 21121012001100.

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, 513422937 + ... + 513464072.

Almost surely, 2^{21121012001112} is an apocalyptic number.

It is an amenable number.

21121012001112 is an abundant number, since it is smaller than the sum of its proper divisors (31743131273688).

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

21121012001112 is a wasteful number, since it uses less digits than its factorization.

21121012001112 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1026887875 (or 1026887871 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 15.

Adding to 21121012001112 its reverse (21110021012112), we get a palindrome (42231033013224).

The spelling of 21121012001112 in words is "twenty-one trillion, one hundred twenty-one billion, twelve million, one thousand, one hundred twelve".