21210121001112 has 32 divisors (see below), whose sum is σ = 56144437945200. Its totient is φ = 6654155608064.

The previous prime is 21210121001101. The next prime is 21210121001123. The reversal of 21210121001112 is 21110012101212.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (21210121001101) and next prime (21210121001123).

It is a junction number, because it is equal to n+sod(n) for n = 21210121001091 and 21210121001100.

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, 25992794937 + ... + 25992795752.

Almost surely, 2^{21210121001112} is an apocalyptic number.

It is an amenable number.

21210121001112 is an abundant number, since it is smaller than the sum of its proper divisors (34934316944088).

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

21210121001112 is a wasteful number, since it uses less digits than its factorization.

21210121001112 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 51985590715 (or 51985590711 counting only the distinct ones).

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

Adding to 21210121001112 its reverse (21110012101212), we get a palindrome (42320133102324).

The spelling of 21210121001112 in words is "twenty-one trillion, two hundred ten billion, one hundred twenty-one million, one thousand, one hundred twelve".