21021112001112 has 32 divisors (see below), whose sum is σ = 55318715793600. Its totient is φ = 6638245894944.

The previous prime is 21021112001111. The next prime is 21021112001159. The reversal of 21021112001112 is 21110021112012.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 21021112001091 and 21021112001100.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21021112001111) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 23049464458 + ... + 23049465369.

It is an arithmetic number, because the mean of its divisors is an integer number (1728709868550).

Almost surely, 2^{21021112001112} is an apocalyptic number.

It is an amenable number.

21021112001112 is an abundant number, since it is smaller than the sum of its proper divisors (34297603792488).

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

21021112001112 is a wasteful number, since it uses less digits than its factorization.

21021112001112 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 46098929855 (or 46098929851 counting only the distinct ones).

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

Adding to 21021112001112 its reverse (21110021112012), we get a palindrome (42131133113124).

The spelling of 21021112001112 in words is "twenty-one trillion, twenty-one billion, one hundred twelve million, one thousand, one hundred twelve".