221210404012124 has 12 divisors (see below), whose sum is σ = 392018437490400. Its totient is φ = 109205136157728.

The previous prime is 221210404012121. The next prime is 221210404012151. The reversal of 221210404012124 is 421210404012122.

It is a junction number, because it is equal to n+sod(n) for n = 221210404012093 and 221210404012102.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221210404012121) 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, 350016461729 + ... + 350016462360.

It is an arithmetic number, because the mean of its divisors is an integer number (32668203124200).

Almost surely, 2^{221210404012124} is an apocalyptic number.

It is an amenable number.

221210404012124 is a deficient number, since it is larger than the sum of its proper divisors (170808033478276).

221210404012124 is a wasteful number, since it uses less digits than its factorization.

221210404012124 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 700032924172 (or 700032924170 counting only the distinct ones).

The product of its (nonzero) digits is 2048, while the sum is 26.

Adding to 221210404012124 its reverse (421210404012122), we get a palindrome (642420808024246).

The spelling of 221210404012124 in words is "two hundred twenty-one trillion, two hundred ten billion, four hundred four million, twelve thousand, one hundred twenty-four".