212123310120 has 96 divisors (see below), whose sum is σ = 689862420000. Its totient is φ = 56528336256.

The previous prime is 212123310101. The next prime is 212123310121. The reversal of 212123310120 is 21013321212.

212123310120 is a `hidden beast` number, since 2 + 1 + 212 + 331 + 0 + 120 = 666.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 212123310093 and 212123310102.

It is not an unprimeable number, because it can be changed into a prime (212123310121) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 343099 + ... + 736181.

It is an arithmetic number, because the mean of its divisors is an integer number (7186066875).

Almost surely, 2^212123310120 is an apocalyptic number.

212123310120 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

212123310120 is an abundant number, since it is smaller than the sum of its proper divisors (477739109880).

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

212123310120 is a wasteful number, since it uses less digits than its factorization.

212123310120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 394599 (or 394592 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 18.

Adding to 212123310120 its reverse (21013321212), we get a palindrome (233136631332).

The spelling of 212123310120 in words is "two hundred twelve billion, one hundred twenty-three million, three hundred ten thousand, one hundred twenty".