1222122202021 has 36 divisors (see below), whose sum is σ = 1532339011008. Its totient is φ = 971284429584.

The previous prime is 1222122202019. The next prime is 1222122202033. The reversal of 1222122202021 is 1202022212221.

It is not a de Polignac number, because 1222122202021 - 2¹ = 1222122202019 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (19).

It is a self number, because there is not a number n which added to its sum of digits gives 1222122202021.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1222122205021) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 96390 + ... + 1566376.

It is an arithmetic number, because the mean of its divisors is an integer number (42564972528).

Almost surely, 2^{1222122202021} is an apocalyptic number.

It is an amenable number.

1222122202021 is a deficient number, since it is larger than the sum of its proper divisors (310216808987).

1222122202021 is a wasteful number, since it uses less digits than its factorization.

1222122202021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1470086 (or 1470060 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 19.

Adding to 1222122202021 its reverse (1202022212221), we get a palindrome (2424144414242).

The spelling of 1222122202021 in words is "one trillion, two hundred twenty-two billion, one hundred twenty-two million, two hundred two thousand, twenty-one".