121010531 has 4 divisors (see below), whose sum is σ = 121330200. Its totient is φ = 120690864.

The previous prime is 121010503. The next prime is 121010537. The reversal of 121010531 is 135010121.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 135010121 = 71 ⋅1901551.

It is a cyclic number.

It is not a de Polignac number, because 121010531 - 2⁶ = 121010467 is a prime.

It is a super-2 number, since 2×121010531² = 29287097225803922, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (121010537) 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, 159266 + ... + 160023.

It is an arithmetic number, because the mean of its divisors is an integer number (30332550).

Almost surely, 2^121010531 is an apocalyptic number.

121010531 is a deficient number, since it is larger than the sum of its proper divisors (319669).

121010531 is an equidigital number, since it uses as much as digits as its factorization.

121010531 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 319668.

The product of its (nonzero) digits is 30, while the sum is 14.

The square root of 121010531 is about 11000.4786714033. The cubic root of 121010531 is about 494.6230930124.

Adding to 121010531 its reverse (135010121), we get a palindrome (256020652).

The spelling of 121010531 in words is "one hundred twenty-one million, ten thousand, five hundred thirty-one".