130121554 has 4 divisors (see below), whose sum is σ = 195182334. Its totient is φ = 65060776.

The previous prime is 130121543. The next prime is 130121591. The reversal of 130121554 is 455121031.

It is a happy number.

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., 112254025 + 17867529 = 10595^2 + 4227^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32530387 + ... + 32530390.

Almost surely, 2^130121554 is an apocalyptic number.

130121554 is a deficient number, since it is larger than the sum of its proper divisors (65060780).

130121554 is an equidigital number, since it uses as much as digits as its factorization.

130121554 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 65060779.

The product of its (nonzero) digits is 600, while the sum is 22.

The square root of 130121554 is about 11407.0835010532. The cubic root of 130121554 is about 506.7375419280.

Adding to 130121554 its reverse (455121031), we get a palindrome (585242585).

The spelling of 130121554 in words is "one hundred thirty million, one hundred twenty-one thousand, five hundred fifty-four".