121013203645 has 4 divisors (see below), whose sum is σ = 145215844380. Its totient is φ = 96810562912.

The previous prime is 121013203637. The next prime is 121013203667. The reversal of 121013203645 is 546302310121.

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 16915343481 + 104097860164 = 130059^2 + 322642^2 .

It is a cyclic number.

It is not a de Polignac number, because 121013203645 - 2³ = 121013203637 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12101320360 + ... + 12101320369.

It is an arithmetic number, because the mean of its divisors is an integer number (36303961095).

Almost surely, 2^121013203645 is an apocalyptic number.

It is an amenable number.

121013203645 is a deficient number, since it is larger than the sum of its proper divisors (24202640735).

121013203645 is an equidigital number, since it uses as much as digits as its factorization.

121013203645 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24202640734.

The product of its (nonzero) digits is 4320, while the sum is 28.

Adding to 121013203645 its reverse (546302310121), we get a palindrome (667315513766).

The spelling of 121013203645 in words is "one hundred twenty-one billion, thirteen million, two hundred three thousand, six hundred forty-five".