121021255450453 has 4 divisors (see below), whose sum is σ = 121021460721568. Its totient is φ = 121021050179340.

The previous prime is 121021255450339. The next prime is 121021255450477. The reversal of 121021255450453 is 354054552120121.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 121021255450453 - 2³⁷ = 120883816496981 is a prime.

It is a super-2 number, since 2×121021255450453² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121021255450153) 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, 101748651 + ... + 102931192.

It is an arithmetic number, because the mean of its divisors is an integer number (30255365180392).

Almost surely, 2^{121021255450453} is an apocalyptic number.

It is an amenable number.

121021255450453 is a deficient number, since it is larger than the sum of its proper divisors (205271115).

121021255450453 is an equidigital number, since it uses as much as digits as its factorization.

121021255450453 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 205271114.

The product of its (nonzero) digits is 240000, while the sum is 40.

The spelling of 121021255450453 in words is "one hundred twenty-one trillion, twenty-one billion, two hundred fifty-five million, four hundred fifty thousand, four hundred fifty-three".