121231541 has 4 divisors (see below), whose sum is σ = 121272000. Its totient is φ = 121191084.

The previous prime is 121231507. The next prime is 121231553. The reversal of 121231541 is 145132121.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 121231541 - 2²² = 117037237 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121231501) 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, 15341 + ... + 21858.

It is an arithmetic number, because the mean of its divisors is an integer number (30318000).

Almost surely, 2^121231541 is an apocalyptic number.

It is an amenable number.

121231541 is a deficient number, since it is larger than the sum of its proper divisors (40459).

121231541 is an equidigital number, since it uses as much as digits as its factorization.

121231541 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40458.

The product of its digits is 240, while the sum is 20.

The square root of 121231541 is about 11010.5195608563. The cubic root of 121231541 is about 494.9240314664.

Adding to 121231541 its reverse (145132121), we get a palindrome (266363662).

The spelling of 121231541 in words is "one hundred twenty-one million, two hundred thirty-one thousand, five hundred forty-one".