21320202231100 has 36 divisors (see below), whose sum is σ = 48699830363800. Its totient is φ = 8079234528960.

The previous prime is 21320202231079. The next prime is 21320202231103. The reversal of 21320202231100 is 113220202312.

It is a super-3 number, since 3×21320202231100³ (a number of 41 digits) contains 333 as substring.

It is a Harshad number since it is a multiple of its sum of digits (19).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21320202231103) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 5610577635 + ... + 5610581434.

Almost surely, 2^{21320202231100} is an apocalyptic number.

21320202231100 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21320202231100 is an abundant number, since it is smaller than the sum of its proper divisors (27379628132700).

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

21320202231100 is a wasteful number, since it uses less digits than its factorization.

21320202231100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11221159102 (or 11221159095 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 19.

Adding to 21320202231100 its reverse (113220202312), we get a palindrome (21433422433412).

The spelling of 21320202231100 in words is "twenty-one trillion, three hundred twenty billion, two hundred two million, two hundred thirty-one thousand, one hundred".