201231002123020 has 96 divisors (see below), whose sum is σ = 428522814720000. Its totient is φ = 79368976528128.

The previous prime is 201231002122993. The next prime is 201231002123023. The reversal of 201231002123020 is 20321200132102.

201231002123020 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not an unprimeable number, because it can be changed into a prime (201231002123023) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 812146311 + ... + 812394049.

It is an arithmetic number, because the mean of its divisors is an integer number (4463779320000).

Almost surely, 2^{201231002123020} is an apocalyptic number.

201231002123020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

201231002123020 is an abundant number, since it is smaller than the sum of its proper divisors (227291812596980).

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

201231002123020 is a wasteful number, since it uses less digits than its factorization.

201231002123020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 249655 (or 249653 counting only the distinct ones).

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

Adding to 201231002123020 its reverse (20321200132102), we get a palindrome (221552202255122).

The spelling of 201231002123020 in words is "two hundred one trillion, two hundred thirty-one billion, two million, one hundred twenty-three thousand, twenty".