21100030331101 has 4 divisors (see below), whose sum is σ = 21100114966752. Its totient is φ = 21099945695452.

The previous prime is 21100030331071. The next prime is 21100030331123. The reversal of 21100030331101 is 10113303000112.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 21100030331101 - 2³¹ = 21097882847453 is a prime.

It is a super-2 number, since 2×21100030331101² (a number of 27 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 (21100060331101) 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, 41942761 + ... + 42442846.

It is an arithmetic number, because the mean of its divisors is an integer number (5275028741688).

Almost surely, 2^{21100030331101} is an apocalyptic number.

It is an amenable number.

21100030331101 is a deficient number, since it is larger than the sum of its proper divisors (84635651).

21100030331101 is an equidigital number, since it uses as much as digits as its factorization.

21100030331101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 84635650.

The product of its (nonzero) digits is 54, while the sum is 16.

Adding to 21100030331101 its reverse (10113303000112), we get a palindrome (31213333331213).

The spelling of 21100030331101 in words is "twenty-one trillion, one hundred billion, thirty million, three hundred thirty-one thousand, one hundred one".