202031123 has 24 divisors (see below), whose sum is σ = 251642880. Its totient is φ = 158701680.

The previous prime is 202031117. The next prime is 202031129. The reversal of 202031123 is 321130202.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (202031117) and next prime (202031129).

It is not a de Polignac number, because 202031123 - 2⁴ = 202031107 is a prime.

It is a super-2 number, since 2×202031123² = 81633149321282258, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 202031098 and 202031107.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (202031129) 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, 77048 + ... + 79626.

It is an arithmetic number, because the mean of its divisors is an integer number (10485120).

Almost surely, 2^202031123 is an apocalyptic number.

202031123 is a deficient number, since it is larger than the sum of its proper divisors (49611757).

202031123 is a wasteful number, since it uses less digits than its factorization.

202031123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2655 (or 2636 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 14.

The square root of 202031123 is about 14213.7652647003. The cubic root of 202031123 is about 586.7765634703.

Adding to 202031123 its reverse (321130202), we get a palindrome (523161325).

The spelling of 202031123 in words is "two hundred two million, thirty-one thousand, one hundred twenty-three".