2121202220022 has 16 divisors (see below), whose sum is σ = 4713782711280. Its totient is φ = 707067406656.

The previous prime is 2121202220021. The next prime is 2121202220051. The reversal of 2121202220022 is 2200222021212.

It is a super-2 number, since 2×2121202220022² (a number of 25 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 2121202219977 and 2121202220004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2121202220021) 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, 19640761243 + ... + 19640761350.

It is an arithmetic number, because the mean of its divisors is an integer number (294611419455).

Almost surely, 2^{2121202220022} is an apocalyptic number.

2121202220022 is an abundant number, since it is smaller than the sum of its proper divisors (2592580491258).

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

2121202220022 is a wasteful number, since it uses less digits than its factorization.

2121202220022 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39281522604 (or 39281522598 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 18.

Adding to 2121202220022 its reverse (2200222021212), we get a palindrome (4321424241234).

The spelling of 2121202220022 in words is "two trillion, one hundred twenty-one billion, two hundred two million, two hundred twenty thousand, twenty-two".