21022002102212 has 12 divisors (see below), whose sum is σ = 36853158346620. Its totient is φ = 10492528288896.

The previous prime is 21022002102107. The next prime is 21022002102259. The reversal of 21022002102212 is 21220120022012.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 12738289217476 + 8283712884736 = 3569074^2 + 2878144^2 .

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, 4618187993 + ... + 4618192544.

It is an arithmetic number, because the mean of its divisors is an integer number (3071096528885).

Almost surely, 2^{21022002102212} is an apocalyptic number.

It is an amenable number.

21022002102212 is a deficient number, since it is larger than the sum of its proper divisors (15831156244408).

21022002102212 is a wasteful number, since it uses less digits than its factorization.

21022002102212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9236381110 (or 9236381108 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 17.

Adding to 21022002102212 its reverse (21220120022012), we get a palindrome (42242122124224).

The spelling of 21022002102212 in words is "twenty-one trillion, twenty-two billion, two million, one hundred two thousand, two hundred twelve".