31220433140421 has 16 divisors (see below), whose sum is σ = 47574297820800. Its totient is φ = 17840133334848.

The previous prime is 31220433140359. The next prime is 31220433140431. The reversal of 31220433140421 is 12404133402213.

It is not a de Polignac number, because 31220433140421 - 2¹⁴ = 31220433124037 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31220433140431) 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 15 ways as a sum of consecutive naturals, for example, 1340706 + ... + 8014883.

It is an arithmetic number, because the mean of its divisors is an integer number (2973393613800).

Almost surely, 2^{31220433140421} is an apocalyptic number.

It is an amenable number.

31220433140421 is a deficient number, since it is larger than the sum of its proper divisors (16353864680379).

31220433140421 is a wasteful number, since it uses less digits than its factorization.

31220433140421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9514508.

The product of its (nonzero) digits is 13824, while the sum is 30.

Adding to 31220433140421 its reverse (12404133402213), we get a palindrome (43624566542634).

The spelling of 31220433140421 in words is "thirty-one trillion, two hundred twenty billion, four hundred thirty-three million, one hundred forty thousand, four hundred twenty-one".