121476521 has 4 divisors (see below), whose sum is σ = 122147844. Its totient is φ = 120805200.

The previous prime is 121476499. The next prime is 121476613. The reversal of 121476521 is 125674121.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 6150400 + 115326121 = 2480^2 + 10739^2 .

It is a cyclic number.

It is not a de Polignac number, because 121476521 - 2²⁶ = 54367657 is a prime.

It is an alternating number because its digits alternate between odd and even.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (121475521) 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, 335390 + ... + 335751.

It is an arithmetic number, because the mean of its divisors is an integer number (30536961).

Almost surely, 2^121476521 is an apocalyptic number.

It is an amenable number.

121476521 is a deficient number, since it is larger than the sum of its proper divisors (671323).

121476521 is an equidigital number, since it uses as much as digits as its factorization.

121476521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 671322.

The product of its digits is 3360, while the sum is 29.

The square root of 121476521 is about 11021.6387619991. The cubic root of 121476521 is about 495.2571815958.

The spelling of 121476521 in words is "one hundred twenty-one million, four hundred seventy-six thousand, five hundred twenty-one".