121103211310021 has 8 divisors (see below), whose sum is σ = 123826805722880. Its totient is φ = 118409382956592.

The previous prime is 121103211309991. The next prime is 121103211310031. The reversal of 121103211310021 is 120013112301121.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 121103211310021 - 2²⁵ = 121103177755589 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121103211310031) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7441506630 + ... + 7441522903.

It is an arithmetic number, because the mean of its divisors is an integer number (15478350715360).

Almost surely, 2^{121103211310021} is an apocalyptic number.

It is an amenable number.

121103211310021 is a deficient number, since it is larger than the sum of its proper divisors (2723594412859).

121103211310021 is a wasteful number, since it uses less digits than its factorization.

121103211310021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14883029715.

The product of its (nonzero) digits is 72, while the sum is 19.

Adding to 121103211310021 its reverse (120013112301121), we get a palindrome (241116323611142).

The spelling of 121103211310021 in words is "one hundred twenty-one trillion, one hundred three billion, two hundred eleven million, three hundred ten thousand, twenty-one".