21112221299 has 8 divisors (see below), whose sum is σ = 23520246960. Its totient is φ = 18816196896.

The previous prime is 21112221287. The next prime is 21112221311. The reversal of 21112221299 is 99212221112.

It is an interprime number because it is at equal distance from previous prime (21112221287) and next prime (21112221311).

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 21112221299 - 2⁸ = 21112221043 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21112221209) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 27999917 + ... + 28000670.

It is an arithmetic number, because the mean of its divisors is an integer number (2940030870).

Almost surely, 2^21112221299 is an apocalyptic number.

21112221299 is a gapful number since it is divisible by the number (29) formed by its first and last digit.

21112221299 is a deficient number, since it is larger than the sum of its proper divisors (2408025661).

21112221299 is a wasteful number, since it uses less digits than its factorization.

21112221299 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 56000629.

The product of its digits is 2592, while the sum is 32.

The spelling of 21112221299 in words is "twenty-one billion, one hundred twelve million, two hundred twenty-one thousand, two hundred ninety-nine".