21212000120099 has 12 divisors (see below), whose sum is σ = 22547543049024. Its totient is φ = 19951494562944.

The previous prime is 21212000120083. The next prime is 21212000120131. The reversal of 21212000120099 is 99002100021212.

It is not a de Polignac number, because 21212000120099 - 2⁴ = 21212000120083 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21212000120299) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 22967024 + ... + 23872749.

It is an arithmetic number, because the mean of its divisors is an integer number (1878961920752).

Almost surely, 2^{21212000120099} is an apocalyptic number.

21212000120099 is a deficient number, since it is larger than the sum of its proper divisors (1335542928925).

21212000120099 is a wasteful number, since it uses less digits than its factorization.

21212000120099 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 46841374 (or 46841357 counting only the distinct ones).

The product of its (nonzero) digits is 1296, while the sum is 29.

The spelling of 21212000120099 in words is "twenty-one trillion, two hundred twelve billion, one hundred twenty thousand, ninety-nine".