221137226839765 has 64 divisors (see below), whose sum is σ = 293735391068160. Its totient is φ = 159078530257920.

The previous prime is 221137226839751. The next prime is 221137226839777. The reversal of 221137226839765 is 567938622731122.

It is a happy number.

It is not a de Polignac number, because 221137226839765 - 2⁵ = 221137226839733 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 221137226839697 and 221137226839706.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 2736704854 + ... + 2736785656.

It is an arithmetic number, because the mean of its divisors is an integer number (4589615485440).

Almost surely, 2^{221137226839765} is an apocalyptic number.

It is an amenable number.

221137226839765 is a deficient number, since it is larger than the sum of its proper divisors (72598164228395).

221137226839765 is a wasteful number, since it uses less digits than its factorization.

221137226839765 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 94082.

The product of its digits is 91445760, while the sum is 64.

The spelling of 221137226839765 in words is "two hundred twenty-one trillion, one hundred thirty-seven billion, two hundred twenty-six million, eight hundred thirty-nine thousand, seven hundred sixty-five".