21120210112011 has 8 divisors (see below), whose sum is σ = 28160314694544. Its totient is φ = 14080122802080.

The previous prime is 21120210111983. The next prime is 21120210112037. The reversal of 21120210112011 is 11021101202112.

It is a happy number.

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

It is not a de Polignac number, because 21120210112011 - 2²¹ = 21120208014859 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21120210112051) 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, 1128456 + ... + 6596501.

It is an arithmetic number, because the mean of its divisors is an integer number (3520039336818).

Almost surely, 2^{21120210112011} is an apocalyptic number.

21120210112011 is a deficient number, since it is larger than the sum of its proper divisors (7040104582533).

21120210112011 is an equidigital number, since it uses as much as digits as its factorization.

21120210112011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8636301.

The product of its (nonzero) digits is 16, while the sum is 15.

Adding to 21120210112011 its reverse (11021101202112), we get a palindrome (32141311314123).

The spelling of 21120210112011 in words is "twenty-one trillion, one hundred twenty billion, two hundred ten million, one hundred twelve thousand, eleven".