1222020221021 has 8 divisors (see below), whose sum is σ = 1297812844224. Its totient is φ = 1146661940160.

The previous prime is 1222020220991. The next prime is 1222020221033. The reversal of 1222020221021 is 1201220202221.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 1222020221021 - 2¹⁸ = 1222019958877 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (17).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1222020251021) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 108579785 + ... + 108591038.

It is an arithmetic number, because the mean of its divisors is an integer number (162226605528).

Almost surely, 2^{1222020221021} is an apocalyptic number.

It is an amenable number.

1222020221021 is a deficient number, since it is larger than the sum of its proper divisors (75792623203).

1222020221021 is a wasteful number, since it uses less digits than its factorization.

1222020221021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 217171171.

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

Adding to 1222020221021 its reverse (1201220202221), we get a palindrome (2423240423242).

The spelling of 1222020221021 in words is "one trillion, two hundred twenty-two billion, twenty million, two hundred twenty-one thousand, twenty-one".