221012321068 has 72 divisors (see below), whose sum is σ = 494876514384. Its totient is φ = 86108594880.

The previous prime is 221012321011. The next prime is 221012321069. The reversal of 221012321068 is 860123210122.

It is a Harshad number since it is a multiple of its sum of digits (28).

It is not an unprimeable number, because it can be changed into a prime (221012321069) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 162721 + ... + 684472.

It is an arithmetic number, because the mean of its divisors is an integer number (6873284922).

Almost surely, 2^221012321068 is an apocalyptic number.

221012321068 is a gapful number since it is divisible by the number (28) formed by its first and last digit.

It is an amenable number.

221012321068 is an abundant number, since it is smaller than the sum of its proper divisors (273864193316).

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

221012321068 is a wasteful number, since it uses less digits than its factorization.

221012321068 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 847244 (or 847213 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 28.

The spelling of 221012321068 in words is "two hundred twenty-one billion, twelve million, three hundred twenty-one thousand, sixty-eight".