222121012011984 has 160 divisors (see below), whose sum is σ = 647027407952640. Its totient is φ = 72949305881088.

The previous prime is 222121012011979. The next prime is 222121012012051. The reversal of 222121012011984 is 489110210121222.

222121012011984 is a `hidden beast` number, since 2 + 221 + 210 + 1 + 201 + 19 + 8 + 4 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 3904167 + ... + 21435590.

It is an arithmetic number, because the mean of its divisors is an integer number (4043921299704).

Almost surely, 2^{222121012011984} is an apocalyptic number.

222121012011984 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 222121012011984, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (323513703976320).

222121012011984 is an abundant number, since it is smaller than the sum of its proper divisors (424906395940656).

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

222121012011984 is a wasteful number, since it uses less digits than its factorization.

222121012011984 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25340074 (or 25340062 counting only the distinct ones).

The product of its (nonzero) digits is 9216, while the sum is 36.

The spelling of 222121012011984 in words is "two hundred twenty-two trillion, one hundred twenty-one billion, twelve million, eleven thousand, nine hundred eighty-four".