21311130132100 has 18 divisors (see below), whose sum is σ = 46245152386874. Its totient is φ = 8524452052800.

The previous prime is 21311130132079. The next prime is 21311130132197. The reversal of 21311130132100 is 123103111312.

It can be written as a sum of positive squares in 3 ways, for example, as 2885350671424 + 18425779460676 = 1698632^2 + 4292526^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 106555650561 + ... + 106555650760.

Almost surely, 2^{21311130132100} is an apocalyptic number.

21311130132100 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21311130132100 is an abundant number, since it is smaller than the sum of its proper divisors (24934022254774).

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

21311130132100 is a wasteful number, since it uses less digits than its factorization.

21311130132100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 213111301335 (or 213111301328 counting only the distinct ones).

The product of its (nonzero) digits is 108, while the sum is 19.

Adding to 21311130132100 its reverse (123103111312), we get a palindrome (21434233243412).

The spelling of 21311130132100 in words is "twenty-one trillion, three hundred eleven billion, one hundred thirty million, one hundred thirty-two thousand, one hundred".