121120553254553 has 4 divisors (see below), whose sum is σ = 121121043909840. Its totient is φ = 121120062599268.

The previous prime is 121120553254489. The next prime is 121120553254577. The reversal of 121120553254553 is 355452355021121.

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 121120553254553 - 2⁶ = 121120553254489 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (121120553256553) 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, 244957175 + ... + 245451132.

It is an arithmetic number, because the mean of its divisors is an integer number (30280260977460).

Almost surely, 2^{121120553254553} is an apocalyptic number.

It is an amenable number.

121120553254553 is a deficient number, since it is larger than the sum of its proper divisors (490655287).

121120553254553 is an equidigital number, since it uses as much as digits as its factorization.

121120553254553 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 490655286.

The product of its (nonzero) digits is 900000, while the sum is 44.

The spelling of 121120553254553 in words is "one hundred twenty-one trillion, one hundred twenty billion, five hundred fifty-three million, two hundred fifty-four thousand, five hundred fifty-three".