1221331683935 has 16 divisors (see below), whose sum is σ = 1600373099520. Its totient is φ = 887386283040.

The previous prime is 1221331683823. The next prime is 1221331683997. The reversal of 1221331683935 is 5393861331221.

It is not a de Polignac number, because 1221331683935 - 2¹² = 1221331679839 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1221331683935.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 10629107 + ... + 10743396.

It is an arithmetic number, because the mean of its divisors is an integer number (100023318720).

Almost surely, 2^{1221331683935} is an apocalyptic number.

1221331683935 is a deficient number, since it is larger than the sum of its proper divisors (379041415585).

1221331683935 is a wasteful number, since it uses less digits than its factorization.

1221331683935 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21373558.

The product of its digits is 699840, while the sum is 47.

The spelling of 1221331683935 in words is "one trillion, two hundred twenty-one billion, three hundred thirty-one million, six hundred eighty-three thousand, nine hundred thirty-five".