221220202111974 has 64 divisors (see below), whose sum is σ = 531924948602880. Its totient is φ = 67745158457760.

The previous prime is 221220202111973. The next prime is 221220202112003. The reversal of 221220202111974 is 479111202022122.

221220202111974 is a `hidden beast` number, since 2 + 212 + 20 + 20 + 211 + 197 + 4 = 666.

221220202111974 is digitally balanced in base 2 and base 4, because in such bases it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221220202111973) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 746601862 + ... + 746898105.

It is an arithmetic number, because the mean of its divisors is an integer number (8311327321920).

Almost surely, 2^{221220202111974} is an apocalyptic number.

221220202111974 is an abundant number, since it is smaller than the sum of its proper divisors (310704746490906).

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

221220202111974 is a wasteful number, since it uses less digits than its factorization.

221220202111974 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1493500202 (or 1493500196 counting only the distinct ones).

The product of its (nonzero) digits is 16128, while the sum is 36.

The spelling of 221220202111974 in words is "two hundred twenty-one trillion, two hundred twenty billion, two hundred two million, one hundred eleven thousand, nine hundred seventy-four".