122128935690 has 32 divisors (see below), whose sum is σ = 303216670080. Its totient is φ = 31444691264.

The previous prime is 122128935653. The next prime is 122128935727. The reversal of 122128935690 is 96539821221.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (122128935653) and next prime (122128935727).

It is a super-2 number, since 2×122128935690² (a number of 23 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 70188174 + ... + 70189913.

It is an arithmetic number, because the mean of its divisors is an integer number (9475520940).

Almost surely, 2^122128935690 is an apocalyptic number.

122128935690 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

122128935690 is an abundant number, since it is smaller than the sum of its proper divisors (181087734390).

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

122128935690 is a wasteful number, since it uses less digits than its factorization.

122128935690 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 140378126.

The product of its (nonzero) digits is 466560, while the sum is 48.

The spelling of 122128935690 in words is "one hundred twenty-two billion, one hundred twenty-eight million, nine hundred thirty-five thousand, six hundred ninety".