31101132132020 has 24 divisors (see below), whose sum is σ = 65312496128544. Its totient is φ = 12440430252576.

The previous prime is 31101132132013. The next prime is 31101132132029. The reversal of 31101132132020 is 2023123110113.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a junction number, because it is equal to n+sod(n) for n = 31101132131983 and 31101132132001.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31101132132029) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 13943687 + ... + 16019633.

It is an arithmetic number, because the mean of its divisors is an integer number (2721354005356).

Almost surely, 2^{31101132132020} is an apocalyptic number.

It is an amenable number.

31101132132020 is an abundant number, since it is smaller than the sum of its proper divisors (34211363996524).

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

31101132132020 is a wasteful number, since it uses less digits than its factorization.

31101132132020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2825039 (or 2825037 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 20.

Adding to 31101132132020 its reverse (2023123110113), we get a palindrome (33124255242133).

The spelling of 31101132132020 in words is "thirty-one trillion, one hundred one billion, one hundred thirty-two million, one hundred thirty-two thousand, twenty".