399100122112 has 22 divisors (see below), whose sum is σ = 797810500058. Its totient is φ = 199550060544.

The previous prime is 399100122061. The next prime is 399100122131. The reversal of 399100122112 is 211221001993.

It can be written as a sum of positive squares in only one way, i.e., 394062529536 + 5037592576 = 627744^2 + 70976^2 .

It is a super-2 number, since 2×399100122112² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 194872083 + ... + 194874130.

It is an arithmetic number, because the mean of its divisors is an integer number (36264113639).

Almost surely, 2^399100122112 is an apocalyptic number.

399100122112 is a gapful number since it is divisible by the number (32) formed by its first and last digit.

It is an amenable number.

399100122112 is a deficient number, since it is larger than the sum of its proper divisors (398710377946).

399100122112 is an equidigital number, since it uses as much as digits as its factorization.

399100122112 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 389746233 (or 389746215 counting only the distinct ones).

The product of its (nonzero) digits is 1944, while the sum is 31.

The spelling of 399100122112 in words is "three hundred ninety-nine billion, one hundred million, one hundred twenty-two thousand, one hundred twelve".