20002121112 has 16 divisors (see below), whose sum is σ = 50005302840. Its totient is φ = 6667373696.

The previous prime is 20002121071. The next prime is 20002121129. The reversal of 20002121112 is 21112120002.

It is a super-2 number, since 2×20002121112² (a number of 21 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (12).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 416710833 + ... + 416710880.

Almost surely, 2^20002121112 is an apocalyptic number.

It is an amenable number.

20002121112 is an abundant number, since it is smaller than the sum of its proper divisors (30003181728).

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

20002121112 is a wasteful number, since it uses less digits than its factorization.

20002121112 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 833421722 (or 833421718 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 12.

Adding to 20002121112 its reverse (21112120002), we get a palindrome (41114241114).

The spelling of 20002121112 in words is "twenty billion, two million, one hundred twenty-one thousand, one hundred twelve".