123020013211221 has 8 divisors (see below), whose sum is σ = 187459067750464. Its totient is φ = 70297150406400.

The previous prime is 123020013211217. The next prime is 123020013211283. The reversal of 123020013211221 is 122112310020321.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 123020013211221 - 2² = 123020013211217 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (21), and also a Moran number because the ratio is a prime number: 5858095867201 = 123020013211221 / (1 + 2 + 3 + 0 + 2 + 0 + 0 + 1 + 3 + 2 + 1 + 1 + 2 + 2 + 1).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (123020013211021) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2929047933580 + ... + 2929047933621.

It is an arithmetic number, because the mean of its divisors is an integer number (23432383468808).

Almost surely, 2^{123020013211221} is an apocalyptic number.

It is an amenable number.

123020013211221 is a deficient number, since it is larger than the sum of its proper divisors (64439054539243).

123020013211221 is an equidigital number, since it uses as much as digits as its factorization.

123020013211221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5858095867211.

The product of its (nonzero) digits is 288, while the sum is 21.

Adding to 123020013211221 its reverse (122112310020321), we get a palindrome (245132323231542).

The spelling of 123020013211221 in words is "one hundred twenty-three trillion, twenty billion, thirteen million, two hundred eleven thousand, two hundred twenty-one".