21132201999 has 4 divisors (see below), whose sum is σ = 28176269336. Its totient is φ = 14088134664.

The previous prime is 21132201977. The next prime is 21132202051. The reversal of 21132201999 is 99910223112.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 21132201999 - 2⁸ = 21132201743 is a prime.

It is a super-2 number, since 2×21132201999² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21132201199) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3522033664 + ... + 3522033669.

It is an arithmetic number, because the mean of its divisors is an integer number (7044067334).

Almost surely, 2^21132201999 is an apocalyptic number.

21132201999 is a deficient number, since it is larger than the sum of its proper divisors (7044067337).

21132201999 is an equidigital number, since it uses as much as digits as its factorization.

21132201999 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7044067336.

The product of its (nonzero) digits is 17496, while the sum is 39.

The spelling of 21132201999 in words is "twenty-one billion, one hundred thirty-two million, two hundred one thousand, nine hundred ninety-nine".