21111343099 has 32 divisors (see below), whose sum is σ = 27980444160. Its totient is φ = 15430176000.

The previous prime is 21111343093. The next prime is 21111343103. The reversal of 21111343099 is 99034311112.

It is a cyclic number.

It is not a de Polignac number, because 21111343099 - 2⁵ = 21111343067 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21111343093) 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, 76327 + ... + 219199.

It is an arithmetic number, because the mean of its divisors is an integer number (874388880).

Almost surely, 2^21111343099 is an apocalyptic number.

21111343099 is a deficient number, since it is larger than the sum of its proper divisors (6869101061).

21111343099 is a wasteful number, since it uses less digits than its factorization.

21111343099 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 143011.

The product of its (nonzero) digits is 5832, while the sum is 34.

The spelling of 21111343099 in words is "twenty-one billion, one hundred eleven million, three hundred forty-three thousand, ninety-nine".