221123013102 has 60 divisors (see below), whose sum is σ = 507859584408. Its totient is φ = 71909834400.

The previous prime is 221123013077. The next prime is 221123013121. The reversal of 221123013102 is 201310321122.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 29 ways as a sum of consecutive naturals, for example, 133674 + ... + 678317.

Almost surely, 2^221123013102 is an apocalyptic number.

221123013102 is an abundant number, since it is smaller than the sum of its proper divisors (286736571306).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

221123013102 is an equidigital number, since it uses as much as digits as its factorization.

221123013102 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 812087 (or 812037 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 18.

Adding to 221123013102 its reverse (201310321122), we get a palindrome (422433334224).

The spelling of 221123013102 in words is "two hundred twenty-one billion, one hundred twenty-three million, thirteen thousand, one hundred two".