21122011001212 has 12 divisors (see below), whose sum is σ = 40323839184216. Its totient is φ = 9600914091440.

The previous prime is 21122011001209. The next prime is 21122011001227. The reversal of 21122011001212 is 21210011022112.

It is a super-2 number, since 2×21122011001212² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

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, 240022852243 + ... + 240022852330.

It is an arithmetic number, because the mean of its divisors is an integer number (3360319932018).

Almost surely, 2^{21122011001212} is an apocalyptic number.

21122011001212 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

21122011001212 is a deficient number, since it is larger than the sum of its proper divisors (19201828183004).

21122011001212 is a wasteful number, since it uses less digits than its factorization.

21122011001212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 480045704588 (or 480045704586 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 16.

Adding to 21122011001212 its reverse (21210011022112), we get a palindrome (42332022023324).

The spelling of 21122011001212 in words is "twenty-one trillion, one hundred twenty-two billion, eleven million, one thousand, two hundred twelve".