121161205 has 8 divisors (see below), whose sum is σ = 158611104. Its totient is φ = 88117200.

The previous prime is 121161197. The next prime is 121161221. The reversal of 121161205 is 502161121.

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

It is not a de Polignac number, because 121161205 - 2³ = 121161197 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 7 ways as a sum of consecutive naturals, for example, 1101411 + ... + 1101520.

It is an arithmetic number, because the mean of its divisors is an integer number (19826388).

Almost surely, 2^121161205 is an apocalyptic number.

It is an amenable number.

121161205 is a deficient number, since it is larger than the sum of its proper divisors (37449899).

121161205 is a wasteful number, since it uses less digits than its factorization.

121161205 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2202947.

The product of its (nonzero) digits is 120, while the sum is 19.

The square root of 121161205 is about 11007.3250610673. The cubic root of 121161205 is about 494.8282980988.

The spelling of 121161205 in words is "one hundred twenty-one million, one hundred sixty-one thousand, two hundred five".