121223121211321 has 8 divisors (see below), whose sum is σ = 122155018485984. Its totient is φ = 120291322875360.

The previous prime is 121223121211243. The next prime is 121223121211349. The reversal of 121223121211321 is 123112121322121.

It is a happy number.

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 121223121211321 - 2²⁷ = 121222986993593 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (121223121215321) 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, 22273851 + ... + 27176656.

It is an arithmetic number, because the mean of its divisors is an integer number (15269377310748).

Almost surely, 2^{121223121211321} is an apocalyptic number.

It is an amenable number.

121223121211321 is a deficient number, since it is larger than the sum of its proper divisors (931897274663).

121223121211321 is a wasteful number, since it uses less digits than its factorization.

121223121211321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 49469351.

The product of its digits is 576, while the sum is 25.

Adding to 121223121211321 its reverse (123112121322121), we get a palindrome (244335242533442).

The spelling of 121223121211321 in words is "one hundred twenty-one trillion, two hundred twenty-three billion, one hundred twenty-one million, two hundred eleven thousand, three hundred twenty-one".