121002055 has 4 divisors (see below), whose sum is σ = 145202472. Its totient is φ = 96801640.

The previous prime is 121002047. The next prime is 121002061. The reversal of 121002055 is 550200121.

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

It is not a de Polignac number, because 121002055 - 2³ = 121002047 is a prime.

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, 12100201 + ... + 12100210.

It is an arithmetic number, because the mean of its divisors is an integer number (36300618).

Almost surely, 2^121002055 is an apocalyptic number.

121002055 is a deficient number, since it is larger than the sum of its proper divisors (24200417).

121002055 is an equidigital number, since it uses as much as digits as its factorization.

121002055 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24200416.

The product of its (nonzero) digits is 100, while the sum is 16.

The square root of 121002055 is about 11000.0934086943. The cubic root of 121002055 is about 494.6115443668.

Adding to 121002055 its reverse (550200121), we get a palindrome (671202176).

The spelling of 121002055 in words is "one hundred twenty-one million, two thousand, fifty-five".