121121131 has 4 divisors (see below), whose sum is σ = 121359600. Its totient is φ = 120882664.

The previous prime is 121121129. The next prime is 121121167. The reversal of 121121131 is 131121121.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 121121131 - 2¹ = 121121129 is a prime.

It is a super-2 number, since 2×121121131² = 29340656749438322, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (121121191) 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, 118471 + ... + 119488.

It is an arithmetic number, because the mean of its divisors is an integer number (30339900).

Almost surely, 2^121121131 is an apocalyptic number.

121121131 is a deficient number, since it is larger than the sum of its proper divisors (238469).

121121131 is an equidigital number, since it uses as much as digits as its factorization.

121121131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 238468.

The product of its digits is 12, while the sum is 13.

The square root of 121121131 is about 11005.5045772559. The cubic root of 121121131 is about 494.7737373565.

Adding to 121121131 its reverse (131121121), we get a palindrome (252242252).

It can be divided in two parts, 121121 and 131, that multiplied together give a palindrome (15866851).

The spelling of 121121131 in words is "one hundred twenty-one million, one hundred twenty-one thousand, one hundred thirty-one".