123421200221 has 16 divisors (see below), whose sum is σ = 135111863040. Its totient is φ = 111809617920.

The previous prime is 123421200211. The next prime is 123421200233. The reversal of 123421200221 is 122002124321.

It is not a de Polignac number, because 123421200221 - 2³⁰ = 122347458397 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 123421200193 and 123421200202.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (123421200211) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3900761 + ... + 3932273.

It is an arithmetic number, because the mean of its divisors is an integer number (8444491440).

Almost surely, 2^123421200221 is an apocalyptic number.

123421200221 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

123421200221 is a deficient number, since it is larger than the sum of its proper divisors (11690662819).

123421200221 is a wasteful number, since it uses less digits than its factorization.

123421200221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32756.

The product of its (nonzero) digits is 384, while the sum is 20.

Adding to 123421200221 its reverse (122002124321), we get a palindrome (245423324542).

The spelling of 123421200221 in words is "one hundred twenty-three billion, four hundred twenty-one million, two hundred thousand, two hundred twenty-one".