221231131198 has 32 divisors (see below), whose sum is σ = 414010356480. Its totient is φ = 86135736960.

The previous prime is 221231131189. The next prime is 221231131217. The reversal of 221231131198 is 891131132122.

221231131198 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×221231131198² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 255963 + ... + 712726.

It is an arithmetic number, because the mean of its divisors is an integer number (12937823640).

Almost surely, 2^221231131198 is an apocalyptic number.

221231131198 is a deficient number, since it is larger than the sum of its proper divisors (192779225282).

221231131198 is a wasteful number, since it uses less digits than its factorization.

221231131198 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 970192.

The product of its digits is 5184, while the sum is 34.

The spelling of 221231131198 in words is "two hundred twenty-one billion, two hundred thirty-one million, one hundred thirty-one thousand, one hundred ninety-eight".