221212002002 has 16 divisors (see below), whose sum is σ = 353901218040. Its totient is φ = 103339911168.

The previous prime is 221212001987. The next prime is 221212002007. The reversal of 221212002002 is 200200212122.

It can be written as a sum of positive squares in 4 ways, for example, as 215566132681 + 5645869321 = 464291^2 + 75139^2 .

It is not an unprimeable number, because it can be changed into a prime (221212002007) 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, 23740727 + ... + 23750042.

Almost surely, 2^221212002002 is an apocalyptic number.

221212002002 is a deficient number, since it is larger than the sum of its proper divisors (132689216038).

221212002002 is a wasteful number, since it uses less digits than its factorization.

221212002002 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 47490925.

The product of its (nonzero) digits is 64, while the sum is 14.

Adding to 221212002002 its reverse (200200212122), we get a palindrome (421412214124).

The spelling of 221212002002 in words is "two hundred twenty-one billion, two hundred twelve million, two thousand, two".