123198607220 has 48 divisors (see below), whose sum is σ = 287606097408. Its totient is φ = 44021335680.

The previous prime is 123198607211. The next prime is 123198607229. The reversal of 123198607220 is 22706891321.

It is an interprime number because it is at equal distance from previous prime (123198607211) and next prime (123198607229).

It is a super-2 number, since 2×123198607220² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (123198607229) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7634534 + ... + 7650653.

It is an arithmetic number, because the mean of its divisors is an integer number (5991793696).

Almost surely, 2^123198607220 is an apocalyptic number.

123198607220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

123198607220 is an abundant number, since it is smaller than the sum of its proper divisors (164407490188).

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

123198607220 is a wasteful number, since it uses less digits than its factorization.

123198607220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15285240 (or 15285238 counting only the distinct ones).

The product of its (nonzero) digits is 72576, while the sum is 41.

The spelling of 123198607220 in words is "one hundred twenty-three billion, one hundred ninety-eight million, six hundred seven thousand, two hundred twenty".