22001022212 has 12 divisors (see below), whose sum is σ = 41463465036. Its totient is φ = 10154317920.

The previous prime is 22001022181. The next prime is 22001022313. The reversal of 22001022212 is 21222010022.

It can be written as a sum of positive squares in 2 ways, for example, as 1061195776 + 20939826436 = 32576^2 + 144706^2 .

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, 211548239 + ... + 211548342.

It is an arithmetic number, because the mean of its divisors is an integer number (3455288753).

Almost surely, 2^22001022212 is an apocalyptic number.

It is an amenable number.

22001022212 is a deficient number, since it is larger than the sum of its proper divisors (19462442824).

22001022212 is a wasteful number, since it uses less digits than its factorization.

22001022212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 423096598 (or 423096596 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 14.

Adding to 22001022212 its reverse (21222010022), we get a palindrome (43223032234).

The spelling of 22001022212 in words is "twenty-two billion, one million, twenty-two thousand, two hundred twelve".