21211212022099 has 16 divisors (see below), whose sum is σ = 23316510389760. Its totient is φ = 19135540136160.

The previous prime is 21211212022093. The next prime is 21211212022127. The reversal of 21211212022099 is 99022021211212.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 21211212022099 - 2¹⁹ = 21211211497811 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21211212022093) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 249334 + ... + 6518020.

It is an arithmetic number, because the mean of its divisors is an integer number (1457281899360).

Almost surely, 2^{21211212022099} is an apocalyptic number.

21211212022099 is a deficient number, since it is larger than the sum of its proper divisors (2105298367661).

21211212022099 is a wasteful number, since it uses less digits than its factorization.

21211212022099 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6271050.

The product of its (nonzero) digits is 5184, while the sum is 34.

The spelling of 21211212022099 in words is "twenty-one trillion, two hundred eleven billion, two hundred twelve million, twenty-two thousand, ninety-nine".