220123031 has 2 divisors, whose sum is σ = 220123032. Its totient is φ = 220123030.

The previous prime is 220122997. The next prime is 220123049. The reversal of 220123031 is 130321022.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 220123031 - 2⁶ = 220122967 is a prime.

It is a super-2 number, since 2×220123031² = 96908297553253922, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 220122997 and 220123015.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (220123081) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 110061515 + 110061516.

It is an arithmetic number, because the mean of its divisors is an integer number (110061516).

Almost surely, 2^220123031 is an apocalyptic number.

220123031 is a deficient number, since it is larger than the sum of its proper divisors (1).

220123031 is an equidigital number, since it uses as much as digits as its factorization.

220123031 is an evil number, because the sum of its binary digits is even.

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

The square root of 220123031 is about 14836.5437686814. The cubic root of 220123031 is about 603.7935852638.

Adding to 220123031 its reverse (130321022), we get a palindrome (350444053).

The spelling of 220123031 in words is "two hundred twenty million, one hundred twenty-three thousand, thirty-one".