1002222211021 has 16 divisors (see below), whose sum is σ = 1022696396928. Its totient is φ = 981912729600.

The previous prime is 1002222211013. The next prime is 1002222211031. The reversal of 1002222211021 is 1201122222001.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 1002222211021 - 2³ = 1002222211013 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1002222210986 and 1002222211004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1002222211031) 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, 81601401 + ... + 81613681.

It is an arithmetic number, because the mean of its divisors is an integer number (63918524808).

Almost surely, 2^{1002222211021} is an apocalyptic number.

It is an amenable number.

1002222211021 is a deficient number, since it is larger than the sum of its proper divisors (20474185907).

1002222211021 is a wasteful number, since it uses less digits than its factorization.

1002222211021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18852.

The product of its (nonzero) digits is 64, while the sum is 16.

Adding to 1002222211021 its reverse (1201122222001), we get a palindrome (2203344433022).

The spelling of 1002222211021 in words is "one trillion, two billion, two hundred twenty-two million, two hundred eleven thousand, twenty-one".