121551451 has 8 divisors (see below), whose sum is σ = 139749120. Its totient is φ = 103562088.

The previous prime is 121551449. The next prime is 121551457. The reversal of 121551451 is 154155121.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 121551451 - 2¹ = 121551449 is a prime.

It is not an unprimeable number, because it can be changed into a prime (121551457) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 50821 + ... + 53158.

It is an arithmetic number, because the mean of its divisors is an integer number (17468640).

Almost surely, 2^121551451 is an apocalyptic number.

121551451 is a deficient number, since it is larger than the sum of its proper divisors (18197669).

121551451 is a wasteful number, since it uses less digits than its factorization.

121551451 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 104153.

The product of its digits is 1000, while the sum is 25.

The square root of 121551451 is about 11025.0374602538. The cubic root of 121551451 is about 495.3589900025.

The spelling of 121551451 in words is "one hundred twenty-one million, five hundred fifty-one thousand, four hundred fifty-one".