21011002122022 has 64 divisors (see below), whose sum is σ = 34782140923200. Its totient is φ = 9439654049280.

The previous prime is 21011002122007. The next prime is 21011002122023. The reversal of 21011002122022 is 22022120011012.

It is a happy number.

It is a super-2 number, since 2×21011002122022² (a number of 27 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 21011002121987 and 21011002122005.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21011002122023) 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 31 ways as a sum of consecutive naturals, for example, 4439254368 + ... + 4439259100.

It is an arithmetic number, because the mean of its divisors is an integer number (543470951925).

Almost surely, 2^{21011002122022} is an apocalyptic number.

21011002122022 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

21011002122022 is a deficient number, since it is larger than the sum of its proper divisors (13771138801178).

21011002122022 is a wasteful number, since it uses less digits than its factorization.

21011002122022 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9001.

The product of its (nonzero) digits is 64, while the sum is 16.

Adding to 21011002122022 its reverse (22022120011012), we get a palindrome (43033122133034).

The spelling of 21011002122022 in words is "twenty-one trillion, eleven billion, two million, one hundred twenty-two thousand, twenty-two".