31143030142021 has 8 divisors (see below), whose sum is σ = 35991944948160. Its totient is φ = 26394092960928.

The previous prime is 31143030141983. The next prime is 31143030142087. The reversal of 31143030142021 is 12024103034113.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 31143030142021 - 2²⁵ = 31142996587589 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31143030142121) 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 7 ways as a sum of consecutive naturals, for example, 24994405591 + ... + 24994406836.

It is an arithmetic number, because the mean of its divisors is an integer number (4498993118520).

Almost surely, 2^{31143030142021} is an apocalyptic number.

It is an amenable number.

31143030142021 is a deficient number, since it is larger than the sum of its proper divisors (4848914806139).

31143030142021 is an equidigital number, since it uses as much as digits as its factorization.

31143030142021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 49988812523.

The product of its (nonzero) digits is 1728, while the sum is 25.

Adding to 31143030142021 its reverse (12024103034113), we get a palindrome (43167133176134).

The spelling of 31143030142021 in words is "thirty-one trillion, one hundred forty-three billion, thirty million, one hundred forty-two thousand, twenty-one".