21110220021101 has 8 divisors (see below), whose sum is σ = 21136870091904. Its totient is φ = 21083571479520.

The previous prime is 21110220021091. The next prime is 21110220021113. The reversal of 21110220021101 is 10112002201112.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21110220021101 is a prime.

It is a super-3 number, since 3×21110220021101³ (a number of 41 digits) contains 333 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 (21110220021181) 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, 28631660 + ... + 29359706.

It is an arithmetic number, because the mean of its divisors is an integer number (2642108761488).

Almost surely, 2^{21110220021101} is an apocalyptic number.

It is an amenable number.

21110220021101 is a deficient number, since it is larger than the sum of its proper divisors (26650070803).

21110220021101 is an equidigital number, since it uses as much as digits as its factorization.

21110220021101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 764611.

The product of its (nonzero) digits is 16, while the sum is 14.

Adding to 21110220021101 its reverse (10112002201112), we get a palindrome (31222222222213).

The spelling of 21110220021101 in words is "twenty-one trillion, one hundred ten billion, two hundred twenty million, twenty-one thousand, one hundred one".