21122001101212 has 24 divisors (see below), whose sum is σ = 40657075007472. Its totient is φ = 9600909589040.

The previous prime is 21122001101207. The next prime is 21122001101249. The reversal of 21122001101212 is 21210110022112.

It is a super-2 number, since 2×21122001101212² (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 7 ways as a sum of consecutive naturals, for example, 1983653683 + ... + 1983664330.

It is an arithmetic number, because the mean of its divisors is an integer number (1694044791978).

Almost surely, 2^{21122001101212} is an apocalyptic number.

21122001101212 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

21122001101212 is a deficient number, since it is larger than the sum of its proper divisors (19535073906260).

21122001101212 is a wasteful number, since it uses less digits than its factorization.

21122001101212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3967318050 (or 3967318026 counting only the distinct ones).

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

Adding to 21122001101212 its reverse (21210110022112), we get a palindrome (42332111123324).

The spelling of 21122001101212 in words is "twenty-one trillion, one hundred twenty-two billion, one million, one hundred one thousand, two hundred twelve".