200123211312 has 60 divisors (see below), whose sum is σ = 566359967160. Its totient is φ = 65958207744.

The previous prime is 200123211311. The next prime is 200123211377. The reversal of 200123211312 is 213112321002.

200123211312 is a `hidden beast` number, since 20 + 0 + 12 + 321 + 1 + 312 = 666.

It is a super-2 number, since 2×200123211312² (a number of 23 digits) contains 22 as substring.

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

It is not an unprimeable number, because it can be changed into a prime (200123211311) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 7794738 + ... + 7820369.

It is an arithmetic number, because the mean of its divisors is an integer number (9439332786).

Almost surely, 2^200123211312 is an apocalyptic number.

It is an amenable number.

200123211312 is an abundant number, since it is smaller than the sum of its proper divisors (366236755848).

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

200123211312 is a wasteful number, since it uses less digits than its factorization.

200123211312 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15615210 (or 15615201 counting only the distinct ones).

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

Adding to 200123211312 its reverse (213112321002), we get a palindrome (413235532314).

The spelling of 200123211312 in words is "two hundred billion, one hundred twenty-three million, two hundred eleven thousand, three hundred twelve".