21120100101099 has 12 divisors (see below), whose sum is σ = 31558770266400. Its totient is φ = 13594547191344.

The previous prime is 21120100101083. The next prime is 21120100101103. The reversal of 21120100101099 is 99010100102112.

It is not a de Polignac number, because 21120100101099 - 2⁴ = 21120100101083 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21120100101019) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 40459961619 + ... + 40459962140.

It is an arithmetic number, because the mean of its divisors is an integer number (2629897522200).

Almost surely, 2^{21120100101099} is an apocalyptic number.

21120100101099 is a gapful number since it is divisible by the number (29) formed by its first and last digit.

21120100101099 is a deficient number, since it is larger than the sum of its proper divisors (10438670165301).

21120100101099 is a wasteful number, since it uses less digits than its factorization.

21120100101099 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 80919923794 (or 80919923791 counting only the distinct ones).

The product of its (nonzero) digits is 324, while the sum is 27.

The spelling of 21120100101099 in words is "twenty-one trillion, one hundred twenty billion, one hundred million, one hundred one thousand, ninety-nine".