103121031 has 16 divisors (see below), whose sum is σ = 156782304. Its totient is φ = 59725824.

The previous prime is 103121023. The next prime is 103121033. The reversal of 103121031 is 130121301.

It is not a de Polignac number, because 103121031 - 2³ = 103121023 is a prime.

It is a super-2 number, since 2×103121031² = 21267894069005922, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 103120998 and 103121016.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (103121033) 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, 77106 + ... + 78431.

It is an arithmetic number, because the mean of its divisors is an integer number (9798894).

Almost surely, 2^103121031 is an apocalyptic number.

103121031 is a deficient number, since it is larger than the sum of its proper divisors (53661273).

103121031 is a wasteful number, since it uses less digits than its factorization.

103121031 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 155570.

The product of its (nonzero) digits is 18, while the sum is 12.

The square root of 103121031 is about 10154.8525838635. The cubic root of 103121031 is about 468.9383476347.

Adding to 103121031 its reverse (130121301), we get a palindrome (233242332).

The spelling of 103121031 in words is "one hundred three million, one hundred twenty-one thousand, thirty-one".