21211001022 has 32 divisors (see below), whose sum is σ = 42617456640. Its totient is φ = 7037802080.

The previous prime is 21211000973. The next prime is 21211001027. The reversal of 21211001022 is 22010011212.

It is a super-3 number, since 3×21211001022³ (a number of 32 digits) contains 333 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 21211000989 and 21211001007.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21211001027) 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, 2266072 + ... + 2275412.

It is an arithmetic number, because the mean of its divisors is an integer number (1331795520).

Almost surely, 2^21211001022 is an apocalyptic number.

21211001022 is an abundant number, since it is smaller than the sum of its proper divisors (21406455618).

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

21211001022 is a wasteful number, since it uses less digits than its factorization.

21211001022 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11048.

The product of its (nonzero) digits is 16, while the sum is 12.

Adding to 21211001022 its reverse (22010011212), we get a palindrome (43221012234).

The spelling of 21211001022 in words is "twenty-one billion, two hundred eleven million, one thousand, twenty-two".