21002222001122 has 8 divisors (see below), whose sum is σ = 31503505937616. Its totient is φ = 10501053355252.

The previous prime is 21002222001053. The next prime is 21002222001179. The reversal of 21002222001122 is 22110022220012.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a self number, because there is not a number n which added to its sum of digits gives 21002222001122.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 28365788 + ... + 29096775.

It is an arithmetic number, because the mean of its divisors is an integer number (3937938242202).

Almost surely, 2^{21002222001122} is an apocalyptic number.

21002222001122 is a deficient number, since it is larger than the sum of its proper divisors (10501283936494).

21002222001122 is a wasteful number, since it uses less digits than its factorization.

21002222001122 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 57645312.

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

Adding to 21002222001122 its reverse (22110022220012), we get a palindrome (43112244221134).

The spelling of 21002222001122 in words is "twenty-one trillion, two billion, two hundred twenty-two million, one thousand, one hundred twenty-two".