31220221332434 has 16 divisors (see below), whose sum is σ = 47268696506400. Its totient is φ = 15463993471584.

The previous prime is 31220221332373. The next prime is 31220221332449. The reversal of 31220221332434 is 43423312202213.

It is a self number, because there is not a number n which added to its sum of digits gives 31220221332434.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 13939997 + ... + 16023855.

It is an arithmetic number, because the mean of its divisors is an integer number (2954293531650).

Almost surely, 2^{31220221332434} is an apocalyptic number.

31220221332434 is a deficient number, since it is larger than the sum of its proper divisors (16048475173966).

31220221332434 is a wasteful number, since it uses less digits than its factorization.

31220221332434 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2153977.

The product of its (nonzero) digits is 41472, while the sum is 32.

Adding to 31220221332434 its reverse (43423312202213), we get a palindrome (74643533534647).

The spelling of 31220221332434 in words is "thirty-one trillion, two hundred twenty billion, two hundred twenty-one million, three hundred thirty-two thousand, four hundred thirty-four".