221121012892 has 12 divisors (see below), whose sum is σ = 416728062856. Its totient is φ = 102055852080.

The previous prime is 221121012841. The next prime is 221121012901. The reversal of 221121012892 is 298210121122.

It is a congruent number.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 2126163534 + ... + 2126163637.

Almost surely, 2^221121012892 is an apocalyptic number.

It is an amenable number.

221121012892 is a deficient number, since it is larger than the sum of its proper divisors (195607049964).

221121012892 is a wasteful number, since it uses less digits than its factorization.

221121012892 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4252327188 (or 4252327186 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 31.

The spelling of 221121012892 in words is "two hundred twenty-one billion, one hundred twenty-one million, twelve thousand, eight hundred ninety-two".