121243131 has 12 divisors (see below), whose sum is σ = 175584240. Its totient is φ = 80618640.

The previous prime is 121243103. The next prime is 121243141. The reversal of 121243131 is 131342121.

It is not a de Polignac number, because 121243131 - 2¹⁴ = 121226747 is a prime.

It is a super-2 number, since 2×121243131² = 29399793629366322, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (121243141) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 13815 + ... + 20816.

It is an arithmetic number, because the mean of its divisors is an integer number (14632020).

Almost surely, 2^121243131 is an apocalyptic number.

121243131 is a deficient number, since it is larger than the sum of its proper divisors (54341109).

121243131 is a wasteful number, since it uses less digits than its factorization.

121243131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35026 (or 35023 counting only the distinct ones).

The product of its digits is 144, while the sum is 18.

The square root of 121243131 is about 11011.0458631322. The cubic root of 121243131 is about 494.9398029032.

Adding to 121243131 its reverse (131342121), we get a palindrome (252585252).

The spelling of 121243131 in words is "one hundred twenty-one million, two hundred forty-three thousand, one hundred thirty-one".