20002021121100 has 72 divisors (see below), whose sum is σ = 58328203644928. Its totient is φ = 5291873294400.

The previous prime is 20002021121057. The next prime is 20002021121143. The reversal of 20002021121100 is 112112020002.

It is an interprime number because it is at equal distance from previous prime (20002021121057) and next prime (20002021121143).

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

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 262455616 + ... + 262531815.

Almost surely, 2^{20002021121100} is an apocalyptic number.

20002021121100 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20002021121100 is an abundant number, since it is smaller than the sum of its proper divisors (38326182523828).

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

20002021121100 is a wasteful number, since it uses less digits than its factorization.

20002021121100 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 524987575 (or 524987568 counting only the distinct ones).

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

Adding to 20002021121100 its reverse (112112020002), we get a palindrome (20114133141102).

The spelling of 20002021121100 in words is "twenty trillion, two billion, twenty-one million, one hundred twenty-one thousand, one hundred".