121051055 has 4 divisors (see below), whose sum is σ = 145261272. Its totient is φ = 96840840.

The previous prime is 121051043. The next prime is 121051097. The reversal of 121051055 is 550150121.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 550150121 = 9001 ⋅61121.

It is not a de Polignac number, because 121051055 - 2⁸ = 121050799 is a prime.

It is a super-2 number, since 2×121051055² = 29306715833226050, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12105101 + ... + 12105110.

It is an arithmetic number, because the mean of its divisors is an integer number (36315318).

Almost surely, 2^121051055 is an apocalyptic number.

121051055 is a deficient number, since it is larger than the sum of its proper divisors (24210217).

121051055 is an equidigital number, since it uses as much as digits as its factorization.

121051055 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24210216.

The product of its (nonzero) digits is 250, while the sum is 20.

The square root of 121051055 is about 11002.3204370714. The cubic root of 121051055 is about 494.6782999684.

The spelling of 121051055 in words is "one hundred twenty-one million, fifty-one thousand, fifty-five".