20122220221021 has 8 divisors (see below), whose sum is σ = 21215503008800. Its totient is φ = 19032359289840.

The previous prime is 20122220220959. The next prime is 20122220221031. The reversal of 20122220221021 is 12012202222102.

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 20122220221021 - 2³⁵ = 20087860482653 is a prime.

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

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 20122220221021.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20122220221031) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 855452070 + ... + 855475591.

It is an arithmetic number, because the mean of its divisors is an integer number (2651937876100).

Almost surely, 2^{20122220221021} is an apocalyptic number.

It is an amenable number.

20122220221021 is a deficient number, since it is larger than the sum of its proper divisors (1093282787779).

20122220221021 is a wasteful number, since it uses less digits than its factorization.

20122220221021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1710928299.

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

Adding to 20122220221021 its reverse (12012202222102), we get a palindrome (32134422443123).

The spelling of 20122220221021 in words is "twenty trillion, one hundred twenty-two billion, two hundred twenty million, two hundred twenty-one thousand, twenty-one".