2122120020021 has 64 divisors (see below), whose sum is σ = 3140377122816. Its totient is φ = 1267864012800.

The previous prime is 2122120020019. The next prime is 2122120020029. The reversal of 2122120020021 is 1200200212212.

It is not a de Polignac number, because 2122120020021 - 2¹ = 2122120020019 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2122120020029) 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 63 ways as a sum of consecutive naturals, for example, 425527890 + ... + 425532876.

It is an arithmetic number, because the mean of its divisors is an integer number (49068392544).

Almost surely, 2^{2122120020021} is an apocalyptic number.

It is an amenable number.

2122120020021 is a deficient number, since it is larger than the sum of its proper divisors (1018257102795).

2122120020021 is a wasteful number, since it uses less digits than its factorization.

2122120020021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6602.

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

Adding to 2122120020021 its reverse (1200200212212), we get a palindrome (3322320232233).

The spelling of 2122120020021 in words is "two trillion, one hundred twenty-two billion, one hundred twenty million, twenty thousand, twenty-one".