201312103122 has 48 divisors (see below), whose sum is σ = 469910809368. Its totient is φ = 61918110720.

The previous prime is 201312103103. The next prime is 201312103163. The reversal of 201312103122 is 221301213102.

It can be written as a sum of positive squares in 4 ways, for example, as 193205081601 + 8107021521 = 439551^2 + 90039^2 .

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 = 201312103095 and 201312103104.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 440872 + ... + 772652.

Almost surely, 2^201312103122 is an apocalyptic number.

201312103122 is an abundant number, since it is smaller than the sum of its proper divisors (268598706246).

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

201312103122 is a wasteful number, since it uses less digits than its factorization.

201312103122 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 334395 (or 334392 counting only the distinct ones).

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

Adding to 201312103122 its reverse (221301213102), we get a palindrome (422613316224).

The spelling of 201312103122 in words is "two hundred one billion, three hundred twelve million, one hundred three thousand, one hundred twenty-two".