2221978859973 has 12 divisors (see below), whose sum is σ = 3240685458400. Its totient is φ = 1466937499176.

The previous prime is 2221978859897. The next prime is 2221978859987. The reversal of 2221978859973 is 3799588791222.

2221978859973 is a `hidden beast` number, since 2 + 2 + 21 + 9 + 7 + 8 + 8 + 599 + 7 + 3 = 666.

It is not a de Polignac number, because 2221978859973 - 2⁸ = 2221978859717 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2221978859273) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1198477423 + ... + 1198479276.

Almost surely, 2^{2221978859973} is an apocalyptic number.

It is an amenable number.

2221978859973 is a deficient number, since it is larger than the sum of its proper divisors (1018706598427).

2221978859973 is a wasteful number, since it uses less digits than its factorization.

2221978859973 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2396956808 (or 2396956805 counting only the distinct ones).

The product of its digits is 274337280, while the sum is 72.

The spelling of 2221978859973 in words is "two trillion, two hundred twenty-one billion, nine hundred seventy-eight million, eight hundred fifty-nine thousand, nine hundred seventy-three".