121210021112213 has 4 divisors (see below), whose sum is σ = 132229113940608. Its totient is φ = 110190928283820.

The previous prime is 121210021112203. The next prime is 121210021112221. The reversal of 121210021112213 is 312211120012121.

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 121210021112213 - 2⁴ = 121210021112197 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 (121210021112203) 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, 5509546414181 + ... + 5509546414202.

It is an arithmetic number, because the mean of its divisors is an integer number (33057278485152).

Almost surely, 2^{121210021112213} is an apocalyptic number.

It is an amenable number.

121210021112213 is a deficient number, since it is larger than the sum of its proper divisors (11019092828395).

121210021112213 is a wasteful number, since it uses less digits than its factorization.

121210021112213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11019092828394.

The product of its (nonzero) digits is 96, while the sum is 20.

Adding to 121210021112213 its reverse (312211120012121), we get a palindrome (433421141124334).

The spelling of 121210021112213 in words is "one hundred twenty-one trillion, two hundred ten billion, twenty-one million, one hundred twelve thousand, two hundred thirteen".