201231020131020 has 144 divisors (see below), whose sum is σ = 665926227832320. Its totient is φ = 48780750979200.

The previous prime is 201231020131003. The next prime is 201231020131103. The reversal of 201231020131020 is 20131020132102.

201231020131020 is a `hidden beast` number, since 2 + 0 + 1 + 2 + 310 + 20 + 1 + 310 + 20 = 666.

201231020131020 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 201231020130984 and 201231020131002.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 35748205 + ... + 40992635.

It is an arithmetic number, because the mean of its divisors is an integer number (4624487693280).

Almost surely, 2^{201231020131020} is an apocalyptic number.

201231020131020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

201231020131020 is an abundant number, since it is smaller than the sum of its proper divisors (464695207701300).

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

201231020131020 is a wasteful number, since it uses less digits than its factorization.

201231020131020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5263836 (or 5263831 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 18.

Adding to 201231020131020 its reverse (20131020132102), we get a palindrome (221362040263122).

The spelling of 201231020131020 in words is "two hundred one trillion, two hundred thirty-one billion, twenty million, one hundred thirty-one thousand, twenty".