21121122000212 has 12 divisors (see below), whose sum is σ = 39805191462036. Its totient is φ = 9748210153920.

The previous prime is 21121122000203. The next prime is 21121122000229. The reversal of 21121122000212 is 21200022112112.

It can be written as a sum of positive squares in 2 ways, for example, as 5766981314116 + 15354140686096 = 2401454^2 + 3918436^2 .

It is a super-2 number, since 2×21121122000212² (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, 203087711489 + ... + 203087711592.

It is an arithmetic number, because the mean of its divisors is an integer number (3317099288503).

Almost surely, 2^{21121122000212} is an apocalyptic number.

It is an amenable number.

21121122000212 is a deficient number, since it is larger than the sum of its proper divisors (18684069461824).

21121122000212 is a wasteful number, since it uses less digits than its factorization.

21121122000212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 406175423098 (or 406175423096 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 17.

Adding to 21121122000212 its reverse (21200022112112), we get a palindrome (42321144112324).

The spelling of 21121122000212 in words is "twenty-one trillion, one hundred twenty-one billion, one hundred twenty-two million, two hundred twelve", and thus it is an aban number.