121011031 has 4 divisors (see below), whose sum is σ = 123294312. Its totient is φ = 118727752.

The previous prime is 121011017. The next prime is 121011043. The reversal of 121011031 is 130110121.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 130110121 = 113 ⋅1151417.

It is a cyclic number.

It is not a de Polignac number, because 121011031 - 2⁵ = 121010999 is a prime.

It is a super-2 number, since 2×121011031² = 29287339247365922, 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 = 121010999 and 121011017.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121011071) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1141561 + ... + 1141666.

It is an arithmetic number, because the mean of its divisors is an integer number (30823578).

Almost surely, 2^121011031 is an apocalyptic number.

121011031 is a deficient number, since it is larger than the sum of its proper divisors (2283281).

121011031 is an equidigital number, since it uses as much as digits as its factorization.

121011031 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2283280.

The product of its (nonzero) digits is 6, while the sum is 10.

The square root of 121011031 is about 11000.5013976637. The cubic root of 121011031 is about 494.6237742512.

Adding to 121011031 its reverse (130110121), we get a palindrome (251121152).

The spelling of 121011031 in words is "one hundred twenty-one million, eleven thousand, thirty-one".