21012222022099 has 32 divisors (see below), whose sum is σ = 26462695127040. Its totient is φ = 16207212336000.

The previous prime is 21012222022079. The next prime is 21012222022109. The reversal of 21012222022099 is 99022022221012.

It is a happy number.

It is not a de Polignac number, because 21012222022099 - 2⁹ = 21012222021587 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21012222022079) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 32757942 + ... + 33393220.

It is an arithmetic number, because the mean of its divisors is an integer number (826959222720).

Almost surely, 2^{21012222022099} is an apocalyptic number.

21012222022099 is a deficient number, since it is larger than the sum of its proper divisors (5450473104941).

21012222022099 is a wasteful number, since it uses less digits than its factorization.

21012222022099 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 639651.

The product of its (nonzero) digits is 10368, while the sum is 34.

The spelling of 21012222022099 in words is "twenty-one trillion, twelve billion, two hundred twenty-two million, twenty-two thousand, ninety-nine".