121220121223001 has 4 divisors (see below), whose sum is σ = 123799272738432. Its totient is φ = 118640969707572.

The previous prime is 121220121222989. The next prime is 121220121223093. The reversal of 121220121223001 is 100322121022121.

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 121220121223001 - 2¹⁸ = 121220120960857 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (121220120223001) 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, 1289575757645 + ... + 1289575757738.

It is an arithmetic number, because the mean of its divisors is an integer number (30949818184608).

Almost surely, 2^{121220121223001} is an apocalyptic number.

It is an amenable number.

121220121223001 is a deficient number, since it is larger than the sum of its proper divisors (2579151515431).

121220121223001 is an equidigital number, since it uses as much as digits as its factorization.

121220121223001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2579151515430.

The product of its (nonzero) digits is 192, while the sum is 20.

Adding to 121220121223001 its reverse (100322121022121), we get a palindrome (221542242245122).

The spelling of 121220121223001 in words is "one hundred twenty-one trillion, two hundred twenty billion, one hundred twenty-one million, two hundred twenty-three thousand, one".