221212314343124 has 24 divisors (see below), whose sum is σ = 417049504182528. Its totient is φ = 102061410017760.

The previous prime is 221212314343123. The next prime is 221212314343157. The reversal of 221212314343124 is 421343413212122.

It is a super-2 number, since 2×221212314343124² (a number of 29 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221212314343123) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 761962172 + ... + 762252435.

It is an arithmetic number, because the mean of its divisors is an integer number (17377062674272).

Almost surely, 2^{221212314343124} is an apocalyptic number.

It is an amenable number.

221212314343124 is a deficient number, since it is larger than the sum of its proper divisors (195837189839404).

221212314343124 is a wasteful number, since it uses less digits than its factorization.

221212314343124 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1524217415 (or 1524217413 counting only the distinct ones).

The product of its digits is 55296, while the sum is 35.

Adding to 221212314343124 its reverse (421343413212122), we get a palindrome (642555727555246).

The spelling of 221212314343124 in words is "two hundred twenty-one trillion, two hundred twelve billion, three hundred fourteen million, three hundred forty-three thousand, one hundred twenty-four".