121021255450523 has 2 divisors, whose sum is σ = 121021255450524. Its totient is φ = 121021255450522.

The previous prime is 121021255450477. The next prime is 121021255450541. The reversal of 121021255450523 is 325054552120121.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 121021255450523 - 2¹⁴ = 121021255434139 is a prime.

It is a super-2 number, since 2×121021255450523² (a number of 29 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (121021255450573) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60510627725261 + 60510627725262.

It is an arithmetic number, because the mean of its divisors is an integer number (60510627725262).

Almost surely, 2^{121021255450523} is an apocalyptic number.

121021255450523 is a deficient number, since it is larger than the sum of its proper divisors (1).

121021255450523 is an equidigital number, since it uses as much as digits as its factorization.

121021255450523 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 120000, while the sum is 38.

The spelling of 121021255450523 in words is "one hundred twenty-one trillion, twenty-one billion, two hundred fifty-five million, four hundred fifty thousand, five hundred twenty-three".