21020132012200 has 96 divisors (see below), whose sum is σ = 49002097649400. Its totient is φ = 8385646325760.

The previous prime is 21020132012171. The next prime is 21020132012213. The reversal of 21020132012200 is 221023102012.

It is a happy number.

It can be written as a sum of positive squares in 12 ways, for example, as 13100736816036 + 7919395196164 = 3619494^2 + 2814142^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 406765564 + ... + 406817236.

Almost surely, 2^{21020132012200} is an apocalyptic number.

21020132012200 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 21020132012200, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (24501048824700).

21020132012200 is an abundant number, since it is smaller than the sum of its proper divisors (27981965637200).

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

21020132012200 is a wasteful number, since it uses less digits than its factorization.

21020132012200 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 57071 (or 57062 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 16.

Adding to 21020132012200 its reverse (221023102012), we get a palindrome (21241155114212).

The spelling of 21020132012200 in words is "twenty-one trillion, twenty billion, one hundred thirty-two million, twelve thousand, two hundred".