21011022002222 has 16 divisors (see below), whose sum is σ = 36019946624352. Its totient is φ = 9004460774400.

The previous prime is 21011022002213. The next prime is 21011022002231. The reversal of 21011022002222 is 22220022011012.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (21011022002213) and next prime (21011022002231).

It is a self number, because there is not a number n which added to its sum of digits gives 21011022002222.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 21414779 + ... + 22374422.

It is an arithmetic number, because the mean of its divisors is an integer number (2251246664022).

Almost surely, 2^{21011022002222} is an apocalyptic number.

21011022002222 is a deficient number, since it is larger than the sum of its proper divisors (15008924622130).

21011022002222 is a wasteful number, since it uses less digits than its factorization.

21011022002222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43823483.

The product of its (nonzero) digits is 128, while the sum is 17.

Adding to 21011022002222 its reverse (22220022011012), we get a palindrome (43231044013234).

The spelling of 21011022002222 in words is "twenty-one trillion, eleven billion, twenty-two million, two thousand, two hundred twenty-two".