121320554 has 4 divisors (see below), whose sum is σ = 181980834. Its totient is φ = 60660276.

The previous prime is 121320539. The next prime is 121320593. The reversal of 121320554 is 455023121.

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

It can be written as a sum of positive squares in only one way, i.e., 96569929 + 24750625 = 9827^2 + 4975^2 .

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30330137 + ... + 30330140.

Almost surely, 2^121320554 is an apocalyptic number.

121320554 is a deficient number, since it is larger than the sum of its proper divisors (60660280).

121320554 is an equidigital number, since it uses as much as digits as its factorization.

121320554 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 60660279.

The product of its (nonzero) digits is 1200, while the sum is 23.

The square root of 121320554 is about 11014.5609989686. The cubic root of 121320554 is about 495.0451327756.

Adding to 121320554 its reverse (455023121), we get a palindrome (576343675).

The spelling of 121320554 in words is "one hundred twenty-one million, three hundred twenty thousand, five hundred fifty-four".