21101102220200 has 48 divisors (see below), whose sum is σ = 49082766148860. Its totient is φ = 8436534912000.

The previous prime is 21101102220151. The next prime is 21101102220223. The reversal of 21101102220200 is 202220110112.

It can be written as a sum of positive squares in 6 ways, for example, as 5241544671364 + 15859557548836 = 2289442^2 + 3982406^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 23979071 + ... + 24843470.

Almost surely, 2^{21101102220200} is an apocalyptic number.

21101102220200 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21101102220200 is an abundant number, since it is smaller than the sum of its proper divisors (27981663928660).

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

21101102220200 is a wasteful number, since it uses less digits than its factorization.

21101102220200 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 48824718 (or 48824709 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 14.

Adding to 21101102220200 its reverse (202220110112), we get a palindrome (21303322330312).

The spelling of 21101102220200 in words is "twenty-one trillion, one hundred one billion, one hundred two million, two hundred twenty thousand, two hundred".