21022003122 has 16 divisors (see below), whose sum is σ = 42733252992. Its totient is φ = 6892459920.

The previous prime is 21022003117. The next prime is 21022003129. The reversal of 21022003122 is 22130022012.

It is a happy number.

It is a super-2 number, since 2×21022003122² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (21022003129) 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, 28718218 + ... + 28718949.

It is an arithmetic number, because the mean of its divisors is an integer number (2670828312).

Almost surely, 2^21022003122 is an apocalyptic number.

21022003122 is an abundant number, since it is smaller than the sum of its proper divisors (21711249870).

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

21022003122 is a wasteful number, since it uses less digits than its factorization.

21022003122 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 57437233.

The product of its (nonzero) digits is 96, while the sum is 15.

Adding to 21022003122 its reverse (22130022012), we get a palindrome (43152025134).

The spelling of 21022003122 in words is "twenty-one billion, twenty-two million, three thousand, one hundred twenty-two".