21220001220099 has 32 divisors (see below), whose sum is σ = 31284759168000. Its totient is φ = 12686195208960.

The previous prime is 21220001220097. The next prime is 21220001220151. The reversal of 21220001220099 is 99002210002212.

It is not a de Polignac number, because 21220001220099 - 2¹ = 21220001220097 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21220001220097) 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, 874074 + ... + 6572975.

It is an arithmetic number, because the mean of its divisors is an integer number (977648724000).

Almost surely, 2^{21220001220099} is an apocalyptic number.

21220001220099 is a deficient number, since it is larger than the sum of its proper divisors (10064757947901).

21220001220099 is a wasteful number, since it uses less digits than its factorization.

21220001220099 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7448235.

The product of its (nonzero) digits is 2592, while the sum is 30.

The spelling of 21220001220099 in words is "twenty-one trillion, two hundred twenty billion, one million, two hundred twenty thousand, ninety-nine".