121240131 has 8 divisors (see below), whose sum is σ = 162134544. Its totient is φ = 80586240.

The previous prime is 121240129. The next prime is 121240139. The reversal of 121240131 is 131042121.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 121240131 - 2¹ = 121240129 is a prime.

It is a super-2 number, since 2×121240131² = 29398338729794322, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 121240131.

It is not an unprimeable number, because it can be changed into a prime (121240139) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 58950 + ... + 60971.

It is an arithmetic number, because the mean of its divisors is an integer number (20266818).

Almost surely, 2^121240131 is an apocalyptic number.

121240131 is a deficient number, since it is larger than the sum of its proper divisors (40894413).

121240131 is a wasteful number, since it uses less digits than its factorization.

121240131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 120261.

The product of its (nonzero) digits is 48, while the sum is 15.

The square root of 121240131 is about 11010.9096354479. The cubic root of 121240131 is about 494.9357206605.

Adding to 121240131 its reverse (131042121), we get a palindrome (252282252).

The spelling of 121240131 in words is "one hundred twenty-one million, two hundred forty thousand, one hundred thirty-one".