121545425211 has 16 divisors (see below), whose sum is σ = 191598700800. Its totient is φ = 67059544608.

The previous prime is 121545425207. The next prime is 121545425213. The reversal of 121545425211 is 112524545121.

It is not a de Polignac number, because 121545425211 - 2² = 121545425207 is a prime.

It is not an unprimeable number, because it can be changed into a prime (121545425213) 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, 99790381 + ... + 99791598.

It is an arithmetic number, because the mean of its divisors is an integer number (11974918800).

Almost surely, 2^121545425211 is an apocalyptic number.

121545425211 is a deficient number, since it is larger than the sum of its proper divisors (70053275589).

121545425211 is a wasteful number, since it uses less digits than its factorization.

121545425211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 199582018.

The product of its digits is 16000, while the sum is 33.

The spelling of 121545425211 in words is "one hundred twenty-one billion, five hundred forty-five million, four hundred twenty-five thousand, two hundred eleven".