2021001220122 has 16 divisors (see below), whose sum is σ = 4069129975200. Its totient is φ = 669145817552.

The previous prime is 2021001220067. The next prime is 2021001220127. The reversal of 2021001220122 is 2210221001202.

It is a super-2 number, since 2×2021001220122² (a number of 25 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (2021001220127) 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, 1130312988 + ... + 1130314775.

It is an arithmetic number, because the mean of its divisors is an integer number (254320623450).

Almost surely, 2^{2021001220122} is an apocalyptic number.

2021001220122 is an abundant number, since it is smaller than the sum of its proper divisors (2048128755078).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

2021001220122 is a wasteful number, since it uses less digits than its factorization.

2021001220122 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2260627917.

The product of its (nonzero) digits is 64, while the sum is 15.

Adding to 2021001220122 its reverse (2210221001202), we get a palindrome (4231222221324).

The spelling of 2021001220122 in words is "two trillion, twenty-one billion, one million, two hundred twenty thousand, one hundred twenty-two".