121313252541 has 16 divisors (see below), whose sum is σ = 174535643520. Its totient is φ = 74507628480.

The previous prime is 121313252539. The next prime is 121313252549. The reversal of 121313252541 is 145252313121.

It is a happy number.

It is not a de Polignac number, because 121313252541 - 2¹ = 121313252539 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 121313252499 and 121313252508.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121313252549) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3035745 + ... + 3075446.

It is an arithmetic number, because the mean of its divisors is an integer number (10908477720).

Almost surely, 2^121313252541 is an apocalyptic number.

It is an amenable number.

121313252541 is a deficient number, since it is larger than the sum of its proper divisors (53222390979).

121313252541 is a wasteful number, since it uses less digits than its factorization.

121313252541 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6111716.

The product of its digits is 7200, while the sum is 30.

Adding to 121313252541 its reverse (145252313121), we get a palindrome (266565565662).

The spelling of 121313252541 in words is "one hundred twenty-one billion, three hundred thirteen million, two hundred fifty-two thousand, five hundred forty-one".