121043903945 has 4 divisors (see below), whose sum is σ = 145252684740. Its totient is φ = 96835123152.

The previous prime is 121043903941. The next prime is 121043903951. The reversal of 121043903945 is 549309340121.

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

It can be written as a sum of positive squares in 2 ways, for example, as 90198709561 + 30845194384 = 300331^2 + 175628^2 .

It is a cyclic number.

It is not a de Polignac number, because 121043903945 - 2² = 121043903941 is a prime.

It is not an unprimeable number, because it can be changed into a prime (121043903941) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12104390390 + ... + 12104390399.

It is an arithmetic number, because the mean of its divisors is an integer number (36313171185).

Almost surely, 2^121043903945 is an apocalyptic number.

It is an amenable number.

121043903945 is a deficient number, since it is larger than the sum of its proper divisors (24208780795).

121043903945 is an equidigital number, since it uses as much as digits as its factorization.

121043903945 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24208780794.

The product of its (nonzero) digits is 116640, while the sum is 41.

The spelling of 121043903945 in words is "one hundred twenty-one billion, forty-three million, nine hundred three thousand, nine hundred forty-five".