21200002121112 has 32 divisors (see below), whose sum is σ = 53000573581680. Its totient is φ = 7066591603200.

The previous prime is 21200002121107. The next prime is 21200002121131. The reversal of 21200002121112 is 21112120000212.

It is a super-2 number, since 2×21200002121112² (a number of 27 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 21200002121091 and 21200002121100.

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, 2427733 + ... + 6949380.

Almost surely, 2^{21200002121112} is an apocalyptic number.

It is an amenable number.

21200002121112 is an abundant number, since it is smaller than the sum of its proper divisors (31800571460568).

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

21200002121112 is a wasteful number, since it uses less digits than its factorization.

21200002121112 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9471323 (or 9471319 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 15.

Adding to 21200002121112 its reverse (21112120000212), we get a palindrome (42312122121324).

The spelling of 21200002121112 in words is "twenty-one trillion, two hundred billion, two million, one hundred twenty-one thousand, one hundred twelve".