121201734622153 has 4 divisors (see below), whose sum is σ = 124157874491028. Its totient is φ = 118245594753280.

The previous prime is 121201734622139. The next prime is 121201734622183. The reversal of 121201734622153 is 351226437102121.

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 22066994792704 + 99134739829449 = 4697552^2 + 9956643^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-121201734622153 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (121201734622183) 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, 1478069934376 + ... + 1478069934457.

It is an arithmetic number, because the mean of its divisors is an integer number (31039468622757).

Almost surely, 2^{121201734622153} is an apocalyptic number.

It is an amenable number.

121201734622153 is a deficient number, since it is larger than the sum of its proper divisors (2956139868875).

121201734622153 is an equidigital number, since it uses as much as digits as its factorization.

121201734622153 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2956139868874.

The product of its (nonzero) digits is 120960, while the sum is 40.

The spelling of 121201734622153 in words is "one hundred twenty-one trillion, two hundred one billion, seven hundred thirty-four million, six hundred twenty-two thousand, one hundred fifty-three".