123240221214221 has 4 divisors (see below), whose sum is σ = 123242292224700. Its totient is φ = 123238150203744.

The previous prime is 123240221214191. The next prime is 123240221214281. The reversal of 123240221214221 is 122412122042321.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 14061525016900 + 109178696197321 = 3749870^2 + 10448861^2 .

It is a cyclic number.

It is not a de Polignac number, because 123240221214221 - 2²⁶ = 123240154105357 is a prime.

It is a super-3 number, since 3×123240221214221³ (a number of 43 digits) contains 333 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (123240221214281) 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, 1035415976 + ... + 1035534993.

It is an arithmetic number, because the mean of its divisors is an integer number (30810573056175).

Almost surely, 2^{123240221214221} is an apocalyptic number.

It is an amenable number.

123240221214221 is a deficient number, since it is larger than the sum of its proper divisors (2071010479).

123240221214221 is an equidigital number, since it uses as much as digits as its factorization.

123240221214221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2071010478.

The product of its (nonzero) digits is 6144, while the sum is 29.

Adding to 123240221214221 its reverse (122412122042321), we get a palindrome (245652343256542).

The spelling of 123240221214221 in words is "one hundred twenty-three trillion, two hundred forty billion, two hundred twenty-one million, two hundred fourteen thousand, two hundred twenty-one".