121090919153 has 4 divisors (see below), whose sum is σ = 121386985380. Its totient is φ = 120794852928.

The previous prime is 121090919137. The next prime is 121090919161. The reversal of 121090919153 is 351919090121.

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 83069039089 + 38021880064 = 288217^2 + 194992^2 .

It is a cyclic number.

It is not a de Polignac number, because 121090919153 - 2⁴ = 121090919137 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 121090919153.

It is not an unprimeable number, because it can be changed into a prime (121090919123) 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, 148032500 + ... + 148033317.

It is an arithmetic number, because the mean of its divisors is an integer number (30346746345).

Almost surely, 2^121090919153 is an apocalyptic number.

It is an amenable number.

121090919153 is a deficient number, since it is larger than the sum of its proper divisors (296066227).

121090919153 is an equidigital number, since it uses as much as digits as its factorization.

121090919153 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 296066226.

The product of its (nonzero) digits is 21870, while the sum is 41.

The spelling of 121090919153 in words is "one hundred twenty-one billion, ninety million, nine hundred nineteen thousand, one hundred fifty-three".