221521041692 has 12 divisors (see below), whose sum is σ = 387699397680. Its totient is φ = 110749785216.

The previous prime is 221521041683. The next prime is 221521041773. The reversal of 221521041692 is 296140125122.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2637392 + ... + 2720087.

It is an arithmetic number, because the mean of its divisors is an integer number (32308283140).

Almost surely, 2^221521041692 is an apocalyptic number.

It is an amenable number.

221521041692 is a deficient number, since it is larger than the sum of its proper divisors (166178355988).

221521041692 is a wasteful number, since it uses less digits than its factorization.

221521041692 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5367820 (or 5367818 counting only the distinct ones).

The product of its (nonzero) digits is 17280, while the sum is 35.

The spelling of 221521041692 in words is "two hundred twenty-one billion, five hundred twenty-one million, forty-one thousand, six hundred ninety-two".