123102001011221 has 4 divisors (see below), whose sum is σ = 123497827381344. Its totient is φ = 122706174641100.

The previous prime is 123102001011211. The next prime is 123102001011277. The reversal of 123102001011221 is 122110100201321.

It is a happy number.

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 123102001011221 - 2²² = 123101996816917 is a prime.

It is a super-2 number, since 2×123102001011221² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 123102001011221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (123102001011211) 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, 197913184595 + ... + 197913185216.

It is an arithmetic number, because the mean of its divisors is an integer number (30874456845336).

Almost surely, 2^{123102001011221} is an apocalyptic number.

It is an amenable number.

123102001011221 is a deficient number, since it is larger than the sum of its proper divisors (395826370123).

123102001011221 is an equidigital number, since it uses as much as digits as its factorization.

123102001011221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 395826370122.

The product of its (nonzero) digits is 48, while the sum is 17.

Adding to 123102001011221 its reverse (122110100201321), we get a palindrome (245212101212542).

The spelling of 123102001011221 in words is "one hundred twenty-three trillion, one hundred two billion, one million, eleven thousand, two hundred twenty-one".