31221002141 has 12 divisors (see below), whose sum is σ = 38229799680. Its totient is φ = 25352391960.

The previous prime is 31221002117. The next prime is 31221002167. The reversal of 31221002141 is 14120012213.

It is not a de Polignac number, because 31221002141 - 2³⁰ = 30147260317 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31221002041) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 16766525 + ... + 16768386.

It is an arithmetic number, because the mean of its divisors is an integer number (3185816640).

Almost surely, 2^31221002141 is an apocalyptic number.

It is an amenable number.

31221002141 is a deficient number, since it is larger than the sum of its proper divisors (7008797539).

31221002141 is a wasteful number, since it uses less digits than its factorization.

31221002141 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33534944 (or 33534937 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 17.

Adding to 31221002141 its reverse (14120012213), we get a palindrome (45341014354).

The spelling of 31221002141 in words is "thirty-one billion, two hundred twenty-one million, two thousand, one hundred forty-one".