20021212200 has 96 divisors (see below), whose sum is σ = 67708121760. Its totient is φ = 4853625600.

The previous prime is 20021212157. The next prime is 20021212207. The reversal of 20021212200 is 221212002.

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

It is not an unprimeable number, because it can be changed into a prime (20021212207) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1510159 + ... + 1523358.

It is an arithmetic number, because the mean of its divisors is an integer number (705292935).

Almost surely, 2^20021212200 is an apocalyptic number.

20021212200 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20021212200 is an abundant number, since it is smaller than the sum of its proper divisors (47686909560).

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

20021212200 is a wasteful number, since it uses less digits than its factorization.

20021212200 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3033547 (or 3033538 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 12.

Adding to 20021212200 its reverse (221212002), we get a palindrome (20242424202).

It can be divided in two parts, 20021 and 212200, that added together give a triangular number (232221 = T₆₈₁).

The spelling of 20021212200 in words is "twenty billion, twenty-one million, two hundred twelve thousand, two hundred".