121522541407 has 16 divisors (see below), whose sum is σ = 125115738112. Its totient is φ = 117946018080.

The previous prime is 121522541347. The next prime is 121522541419. The reversal of 121522541407 is 704145225121.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-121522541407 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 (121522541207) 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, 30174928 + ... + 30178954.

It is an arithmetic number, because the mean of its divisors is an integer number (7819733632).

Almost surely, 2^121522541407 is an apocalyptic number.

121522541407 is a deficient number, since it is larger than the sum of its proper divisors (3593196705).

121522541407 is an equidigital number, since it uses as much as digits as its factorization.

121522541407 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5878.

The product of its (nonzero) digits is 22400, while the sum is 34.

Adding to 121522541407 its reverse (704145225121), we get a palindrome (825667766528).

The spelling of 121522541407 in words is "one hundred twenty-one billion, five hundred twenty-two million, five hundred forty-one thousand, four hundred seven".