21223020099 has 8 divisors (see below), whose sum is σ = 29961910800. Its totient is φ = 13316404736.

The previous prime is 21223020061. The next prime is 21223020107. The reversal of 21223020099 is 99002032212.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 21223020099 - 2⁷ = 21223019971 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21223024099) 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 7 ways as a sum of consecutive naturals, for example, 208068774 + ... + 208068875.

It is an arithmetic number, because the mean of its divisors is an integer number (3745238850).

Almost surely, 2^21223020099 is an apocalyptic number.

21223020099 is a deficient number, since it is larger than the sum of its proper divisors (8738890701).

21223020099 is a wasteful number, since it uses less digits than its factorization.

21223020099 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 416137669.

The product of its (nonzero) digits is 3888, while the sum is 30.

The spelling of 21223020099 in words is "twenty-one billion, two hundred twenty-three million, twenty thousand, ninety-nine".