121154551 has 8 divisors (see below), whose sum is σ = 138830720. Its totient is φ = 103570488.

The previous prime is 121154513. The next prime is 121154557. The reversal of 121154551 is 155451121.

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

It is not a de Polignac number, because 121154551 - 2¹¹ = 121152503 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121154557) 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, 20181 + ... + 25486.

It is an arithmetic number, because the mean of its divisors is an integer number (17353840).

Almost surely, 2^121154551 is an apocalyptic number.

121154551 is a deficient number, since it is larger than the sum of its proper divisors (17676169).

121154551 is an equidigital number, since it uses as much as digits as its factorization.

121154551 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 46053.

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

The square root of 121154551 is about 11007.0228036468. The cubic root of 121154551 is about 494.8192395123.

The spelling of 121154551 in words is "one hundred twenty-one million, one hundred fifty-four thousand, five hundred fifty-one".