21022100012 has 12 divisors (see below), whose sum is σ = 36789692016. Its totient is φ = 10510759440.

The previous prime is 21022100009. The next prime is 21022100053. The reversal of 21022100012 is 21000122012.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 21022099966 and 21022100002.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 233462 + ... + 310722.

It is an arithmetic number, because the mean of its divisors is an integer number (3065807668).

Almost surely, 2^21022100012 is an apocalyptic number.

It is an amenable number.

21022100012 is a deficient number, since it is larger than the sum of its proper divisors (15767592004).

21022100012 is a wasteful number, since it uses less digits than its factorization.

21022100012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 145288 (or 145286 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 11.

Adding to 21022100012 its reverse (21000122012), we get a palindrome (42022222024).

The spelling of 21022100012 in words is "twenty-one billion, twenty-two million, one hundred thousand, twelve".