221878722898 has 48 divisors (see below), whose sum is σ = 399791718144. Its totient is φ = 91989565920.

The previous prime is 221878722889. The next prime is 221878722907. The reversal of 221878722898 is 898227878122.

It is an interprime number because it is at equal distance from previous prime (221878722889) and next prime (221878722907).

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 9305640 + ... + 9329452.

It is an arithmetic number, because the mean of its divisors is an integer number (8328994128).

Almost surely, 2^221878722898 is an apocalyptic number.

221878722898 is a deficient number, since it is larger than the sum of its proper divisors (177912995246).

221878722898 is a wasteful number, since it uses less digits than its factorization.

221878722898 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26927 (or 26920 counting only the distinct ones).

The product of its digits is 28901376, while the sum is 64.

The spelling of 221878722898 in words is "two hundred twenty-one billion, eight hundred seventy-eight million, seven hundred twenty-two thousand, eight hundred ninety-eight".