121489477 has 4 divisors (see below), whose sum is σ = 127883680. Its totient is φ = 115095276.

The previous prime is 121489451. The next prime is 121489499. The reversal of 121489477 is 774984121.

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 121489477 - 2⁷ = 121489349 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121484477) 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, 3197073 + ... + 3197110.

It is an arithmetic number, because the mean of its divisors is an integer number (31970920).

Almost surely, 2^121489477 is an apocalyptic number.

It is an amenable number.

121489477 is a deficient number, since it is larger than the sum of its proper divisors (6394203).

121489477 is an equidigital number, since it uses as much as digits as its factorization.

121489477 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6394202.

The product of its digits is 112896, while the sum is 43.

The square root of 121489477 is about 11022.2264992151. The cubic root of 121489477 is about 495.2747880817.

The spelling of 121489477 in words is "one hundred twenty-one million, four hundred eighty-nine thousand, four hundred seventy-seven".