201220123120331 has 16 divisors (see below), whose sum is σ = 234324929963520. Its totient is φ = 169234671503040.

The previous prime is 201220123120321. The next prime is 201220123120343. The reversal of 201220123120331 is 133021321022102.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-201220123120331 is a prime.

It is a super-2 number, since 2×201220123120331² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 201220123120297 and 201220123120306.

It is not an unprimeable number, because it can be changed into a prime (201220123120321) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1232688431 + ... + 1232851656.

It is an arithmetic number, because the mean of its divisors is an integer number (14645308122720).

Almost surely, 2^{201220123120331} is an apocalyptic number.

201220123120331 is a deficient number, since it is larger than the sum of its proper divisors (33104806843189).

201220123120331 is a wasteful number, since it uses less digits than its factorization.

201220123120331 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2465540314.

The product of its (nonzero) digits is 864, while the sum is 23.

Adding to 201220123120331 its reverse (133021321022102), we get a palindrome (334241444142433).

The spelling of 201220123120331 in words is "two hundred one trillion, two hundred twenty billion, one hundred twenty-three million, one hundred twenty thousand, three hundred thirty-one".