121147794448121 has 6 divisors (see below), whose sum is σ = 140927026194810. Its totient is φ = 103840966669776.

The previous prime is 121147794448103. The next prime is 121147794448127. The reversal of 121147794448121 is 121844497741121.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 69420974205625 + 51726820242496 = 8331925^2 + 7192136^2 .

It is a de Polignac number, because none of the positive numbers 2^k-121147794448121 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (121147794448127) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1236201984116 + ... + 1236201984213.

It is an arithmetic number, because the mean of its divisors is an integer number (23487837699135).

Almost surely, 2^{121147794448121} is an apocalyptic number.

It is an amenable number.

121147794448121 is a deficient number, since it is larger than the sum of its proper divisors (19779231746689).

121147794448121 is an equidigital number, since it uses as much as digits as its factorization.

121147794448121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2472403968343 (or 2472403968336 counting only the distinct ones).

The product of its digits is 3612672, while the sum is 56.

The spelling of 121147794448121 in words is "one hundred twenty-one trillion, one hundred forty-seven billion, seven hundred ninety-four million, four hundred forty-eight thousand, one hundred twenty-one".