121321223212013 has 4 divisors (see below), whose sum is σ = 132350425322208. Its totient is φ = 110292021101820.

The previous prime is 121321223212009. The next prime is 121321223212027. The reversal of 121321223212013 is 310212322123121.

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 121321223212013 - 2² = 121321223212009 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 (121321223212093) 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, 5514601055081 + ... + 5514601055102.

It is an arithmetic number, because the mean of its divisors is an integer number (33087606330552).

Almost surely, 2^{121321223212013} is an apocalyptic number.

It is an amenable number.

121321223212013 is a deficient number, since it is larger than the sum of its proper divisors (11029202110195).

121321223212013 is a wasteful number, since it uses less digits than its factorization.

121321223212013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11029202110194.

The product of its (nonzero) digits is 1728, while the sum is 26.

Adding to 121321223212013 its reverse (310212322123121), we get a palindrome (431533545335134).

The spelling of 121321223212013 in words is "one hundred twenty-one trillion, three hundred twenty-one billion, two hundred twenty-three million, two hundred twelve thousand, thirteen".