21003212022 has 16 divisors (see below), whose sum is σ = 45237687600. Its totient is φ = 6462526752.

The previous prime is 21003211993. The next prime is 21003212033. The reversal of 21003212022 is 22021230012.

It is a happy number.

It is a super-2 number, since 2×21003212022² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 21003211992 and 21003212010.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 134635897 + ... + 134636052.

It is an arithmetic number, because the mean of its divisors is an integer number (2827355475).

Almost surely, 2^21003212022 is an apocalyptic number.

21003212022 is an abundant number, since it is smaller than the sum of its proper divisors (24234475578).

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

21003212022 is a wasteful number, since it uses less digits than its factorization.

21003212022 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 269271967.

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

Adding to 21003212022 its reverse (22021230012), we get a palindrome (43024442034).

The spelling of 21003212022 in words is "twenty-one billion, three million, two hundred twelve thousand, twenty-two".