221212342002 has 32 divisors (see below), whose sum is σ = 481110475392. Its totient is φ = 67524274944.

The previous prime is 221212341983. The next prime is 221212342007. The reversal of 221212342002 is 200243212122.

It is a self number, because there is not a number n which added to its sum of digits gives 221212342002.

It is not an unprimeable number, because it can be changed into a prime (221212342007) 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, 29303638 + ... + 29311185.

It is an arithmetic number, because the mean of its divisors is an integer number (15034702356).

Almost surely, 2^221212342002 is an apocalyptic number.

221212342002 is an abundant number, since it is smaller than the sum of its proper divisors (259898133390).

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

221212342002 is a wasteful number, since it uses less digits than its factorization.

221212342002 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 58614882.

The product of its (nonzero) digits is 768, while the sum is 21.

Adding to 221212342002 its reverse (200243212122), we get a palindrome (421455554124).

The spelling of 221212342002 in words is "two hundred twenty-one billion, two hundred twelve million, three hundred forty-two thousand, two".