221772012336372 has 12 divisors (see below), whose sum is σ = 517468028784896. Its totient is φ = 73924004112120.

The previous prime is 221772012336349. The next prime is 221772012336373. The reversal of 221772012336372 is 273633210277122.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221772012336373) 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, 9240500514004 + ... + 9240500514027.

Almost surely, 2^{221772012336372} is an apocalyptic number.

It is an amenable number.

221772012336372 is an abundant number, since it is smaller than the sum of its proper divisors (295696016448524).

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

221772012336372 is a wasteful number, since it uses less digits than its factorization.

221772012336372 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18481001028038 (or 18481001028036 counting only the distinct ones).

The product of its (nonzero) digits is 1778112, while the sum is 48.

The spelling of 221772012336372 in words is "two hundred twenty-one trillion, seven hundred seventy-two billion, twelve million, three hundred thirty-six thousand, three hundred seventy-two".