123220031 has 8 divisors (see below), whose sum is σ = 135656400. Its totient is φ = 110989440.

The previous prime is 123219977. The next prime is 123220051. The reversal of 123220031 is 130022321.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-123220031 is a prime.

It is a super-2 number, since 2×123220031² = 30366352079281922, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 123219988 and 123220015.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (123220051) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 50186 + ... + 52583.

It is an arithmetic number, because the mean of its divisors is an integer number (16957050).

Almost surely, 2^123220031 is an apocalyptic number.

123220031 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

123220031 is a deficient number, since it is larger than the sum of its proper divisors (12436369).

123220031 is a wasteful number, since it uses less digits than its factorization.

123220031 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 102889.

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

The square root of 123220031 is about 11100.4518376506. The cubic root of 123220031 is about 497.6153529979.

Adding to 123220031 its reverse (130022321), we get a palindrome (253242352).

The spelling of 123220031 in words is "one hundred twenty-three million, two hundred twenty thousand, thirty-one".