21002121310222 has 32 divisors (see below), whose sum is σ = 33942131939520. Its totient is φ = 9688822525440.

The previous prime is 21002121310207. The next prime is 21002121310241. The reversal of 21002121310222 is 22201312120012.

It is a self number, because there is not a number n which added to its sum of digits gives 21002121310222.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 707818447 + ... + 707848117.

It is an arithmetic number, because the mean of its divisors is an integer number (1060691623110).

Almost surely, 2^{21002121310222} is an apocalyptic number.

21002121310222 is a deficient number, since it is larger than the sum of its proper divisors (12940010629298).

21002121310222 is a wasteful number, since it uses less digits than its factorization.

21002121310222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41308.

The product of its (nonzero) digits is 192, while the sum is 19.

Adding to 21002121310222 its reverse (22201312120012), we get a palindrome (43203433430234).

The spelling of 21002121310222 in words is "twenty-one trillion, two billion, one hundred twenty-one million, three hundred ten thousand, two hundred twenty-two".