21212021122022 has 32 divisors (see below), whose sum is σ = 33387194602944. Its totient is φ = 10088124393600.

The previous prime is 21212021122021. The next prime is 21212021122079. The reversal of 21212021122022 is 22022112021212.

It is a super-2 number, since 2×21212021122022² (a number of 27 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 21212021121985 and 21212021122003.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21212021122021) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 130312148 + ... + 130474824.

It is an arithmetic number, because the mean of its divisors is an integer number (1043349831342).

Almost surely, 2^{21212021122022} is an apocalyptic number.

21212021122022 is a deficient number, since it is larger than the sum of its proper divisors (12175173480922).

21212021122022 is a wasteful number, since it uses less digits than its factorization.

21212021122022 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 178544.

The product of its (nonzero) digits is 256, while the sum is 20.

Adding to 21212021122022 its reverse (22022112021212), we get a palindrome (43234133143234).

The spelling of 21212021122022 in words is "twenty-one trillion, two hundred twelve billion, twenty-one million, one hundred twenty-two thousand, twenty-two".