121545111 has 16 divisors (see below), whose sum is σ = 167580000. Its totient is φ = 78300288.

The previous prime is 121545101. The next prime is 121545139. The reversal of 121545111 is 111545121.

It is not a de Polignac number, because 121545111 - 2²³ = 113156503 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121545101) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 12865 + ... + 20213.

It is an arithmetic number, because the mean of its divisors is an integer number (10473750).

Almost surely, 2^121545111 is an apocalyptic number.

121545111 is a deficient number, since it is larger than the sum of its proper divisors (46034889).

121545111 is a wasteful number, since it uses less digits than its factorization.

121545111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7538.

The product of its digits is 200, while the sum is 21.

The square root of 121545111 is about 11024.7499291367. The cubic root of 121545111 is about 495.3503773792.

The spelling of 121545111 in words is "one hundred twenty-one million, five hundred forty-five thousand, one hundred eleven".