123021210221 has 64 divisors (see below), whose sum is σ = 155049269760. Its totient is φ = 95033917440.

The previous prime is 123021210167. The next prime is 123021210287. The reversal of 123021210221 is 122012120321.

It is not a de Polignac number, because 123021210221 - 2¹⁰ = 123021209197 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 123021210221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (123021210121) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 329815391 + ... + 329815763.

It is an arithmetic number, because the mean of its divisors is an integer number (2422644840).

Almost surely, 2^123021210221 is an apocalyptic number.

It is an amenable number.

123021210221 is a deficient number, since it is larger than the sum of its proper divisors (32028059539).

123021210221 is a wasteful number, since it uses less digits than its factorization.

123021210221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 886.

The product of its (nonzero) digits is 96, while the sum is 17.

Adding to 123021210221 its reverse (122012120321), we get a palindrome (245033330542).

The spelling of 123021210221 in words is "one hundred twenty-three billion, twenty-one million, two hundred ten thousand, two hundred twenty-one".