2120221222021 has 8 divisors (see below), whose sum is σ = 2565645848640. Its totient is φ = 1710430565568.

The previous prime is 2120221222013. The next prime is 2120221222069. The reversal of 2120221222021 is 1202221220212.

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 2120221222021 - 2³ = 2120221222013 is a prime.

It is a super-3 number, since 3×2120221222021³ (a number of 38 digits) contains 333 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 2120221222021.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2120221222421) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8908492411 + ... + 8908492648.

It is an arithmetic number, because the mean of its divisors is an integer number (320705731080).

Almost surely, 2^{2120221222021} is an apocalyptic number.

It is an amenable number.

2120221222021 is a deficient number, since it is larger than the sum of its proper divisors (445424626619).

2120221222021 is a wasteful number, since it uses less digits than its factorization.

2120221222021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17816985083.

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

Adding to 2120221222021 its reverse (1202221220212), we get a palindrome (3322442442233).

The spelling of 2120221222021 in words is "two trillion, one hundred twenty billion, two hundred twenty-one million, two hundred twenty-two thousand, twenty-one".