21020222022 has 16 divisors (see below), whose sum is σ = 43065821232. Its totient is φ = 6835844480.

The previous prime is 21020221997. The next prime is 21020222029. The reversal of 21020222022 is 22022202012.

It is a super-3 number, since 3×21020222022³ (a number of 32 digits) contains 333 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 21020221992 and 21020222010.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21020222029) 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, 42723783 + ... + 42724274.

It is an arithmetic number, because the mean of its divisors is an integer number (2691613827).

Almost surely, 2^21020222022 is an apocalyptic number.

21020222022 is an abundant number, since it is smaller than the sum of its proper divisors (22045599210).

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

21020222022 is a wasteful number, since it uses less digits than its factorization.

21020222022 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 85448103.

The product of its (nonzero) digits is 128, while the sum is 15.

Adding to 21020222022 its reverse (22022202012), we get a palindrome (43042424034).

The spelling of 21020222022 in words is "twenty-one billion, twenty million, two hundred twenty-two thousand, twenty-two".