21021111101099 has 8 divisors (see below), whose sum is σ = 21061896099840. Its totient is φ = 20980358182696.

The previous prime is 21021111101093. The next prime is 21021111101203. The reversal of 21021111101099 is 99010111112012.

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 21021111101099 - 2¹² = 21021111097003 is a prime.

It is a super-2 number, since 2×21021111101099² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21021111101093) 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, 6708077 + ... + 9329550.

It is an arithmetic number, because the mean of its divisors is an integer number (2632737012480).

Almost surely, 2^{21021111101099} is an apocalyptic number.

21021111101099 is a deficient number, since it is larger than the sum of its proper divisors (40784998741).

21021111101099 is a wasteful number, since it uses less digits than its factorization.

21021111101099 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16040169.

The product of its (nonzero) digits is 324, while the sum is 29.

The spelling of 21021111101099 in words is "twenty-one trillion, twenty-one billion, one hundred eleven million, one hundred one thousand, ninety-nine".