31140203120021 has 12 divisors (see below), whose sum is σ = 32212143871200. Its totient is φ = 30102887767320.

The previous prime is 31140203120017. The next prime is 31140203120041. The reversal of 31140203120021 is 12002130204113.

It is not a de Polignac number, because 31140203120021 - 2² = 31140203120017 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 31140203119975 and 31140203120002.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31140203120041) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 16746851 + ... + 18513168.

It is an arithmetic number, because the mean of its divisors is an integer number (2684345322600).

Almost surely, 2^{31140203120021} is an apocalyptic number.

31140203120021 is a gapful number since it is divisible by the number (31) formed by its first and last digit.

It is an amenable number.

31140203120021 is a deficient number, since it is larger than the sum of its proper divisors (1071940751179).

31140203120021 is an equidigital number, since it uses as much as digits as its factorization.

31140203120021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35261000 (or 35260969 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 20.

Adding to 31140203120021 its reverse (12002130204113), we get a palindrome (43142333324134).

The spelling of 31140203120021 in words is "thirty-one trillion, one hundred forty billion, two hundred three million, one hundred twenty thousand, twenty-one".