20331201123 has 40 divisors (see below), whose sum is σ = 32135906000. Its totient is φ = 12774039552.

The previous prime is 20331201103. The next prime is 20331201167. The reversal of 20331201123 is 32110213302.

It is not a de Polignac number, because 20331201123 - 2¹⁷ = 20331070051 is a prime.

It is a super-2 number, since 2×20331201123² (a number of 21 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 = 20331201096 and 20331201105.

It is not an unprimeable number, because it can be changed into a prime (20331201103) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 262803 + ... + 331251.

It is an arithmetic number, because the mean of its divisors is an integer number (803397650).

Almost surely, 2^20331201123 is an apocalyptic number.

20331201123 is a deficient number, since it is larger than the sum of its proper divisors (11804704877).

20331201123 is a wasteful number, since it uses less digits than its factorization.

20331201123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 68673 (or 68664 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 18.

Adding to 20331201123 its reverse (32110213302), we get a palindrome (52441414425).

The spelling of 20331201123 in words is "twenty billion, three hundred thirty-one million, two hundred one thousand, one hundred twenty-three".