221073801276 has 12 divisors (see below), whose sum is σ = 515838869672. Its totient is φ = 73691267088.

The previous prime is 221073801271. The next prime is 221073801323. The reversal of 221073801276 is 672108370122.

It is a tau number, because it is divible by the number of its divisors (12).

It is a super-2 number, since 2×221073801276² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221073801271) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9211408375 + ... + 9211408398.

Almost surely, 2^221073801276 is an apocalyptic number.

It is an amenable number.

221073801276 is an abundant number, since it is smaller than the sum of its proper divisors (294765068396).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

221073801276 is a wasteful number, since it uses less digits than its factorization.

221073801276 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18422816780 (or 18422816778 counting only the distinct ones).

The product of its (nonzero) digits is 56448, while the sum is 39.

The spelling of 221073801276 in words is "two hundred twenty-one billion, seventy-three million, eight hundred one thousand, two hundred seventy-six".