2122122220021 has 8 divisors (see below), whose sum is σ = 2234279405600. Its totient is φ = 2010011688720.

The previous prime is 2122122220013. The next prime is 2122122220027. The reversal of 2122122220021 is 1200222212212.

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

It is not a de Polignac number, because 2122122220021 - 2³ = 2122122220013 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 congruent number.

It is not an unprimeable number, because it can be changed into a prime (2122122220027) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11570175 + ... + 11752156.

It is an arithmetic number, because the mean of its divisors is an integer number (279284925700).

Almost surely, 2^{2122122220021} is an apocalyptic number.

It is an amenable number.

2122122220021 is a deficient number, since it is larger than the sum of its proper divisors (112157185579).

2122122220021 is a wasteful number, since it uses less digits than its factorization.

2122122220021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23327139.

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

Adding to 2122122220021 its reverse (1200222212212), we get a palindrome (3322344432233).

The spelling of 2122122220021 in words is "two trillion, one hundred twenty-two billion, one hundred twenty-two million, two hundred twenty thousand, twenty-one".