21020201112111 has 8 divisors (see below), whose sum is σ = 28027097458560. Its totient is φ = 14013386086872.

The previous prime is 21020201112089. The next prime is 21020201112121. The reversal of 21020201112111 is 11121110202012.

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 21020201112111 - 2¹³ = 21020201103919 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21020201112121) 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, 19724595 + ... + 20762948.

It is an arithmetic number, because the mean of its divisors is an integer number (3503387182320).

Almost surely, 2^{21020201112111} is an apocalyptic number.

21020201112111 is a deficient number, since it is larger than the sum of its proper divisors (7006896346449).

21020201112111 is a wasteful number, since it uses less digits than its factorization.

21020201112111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40660605.

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

Adding to 21020201112111 its reverse (11121110202012), we get a palindrome (32141311314123).

The spelling of 21020201112111 in words is "twenty-one trillion, twenty billion, two hundred one million, one hundred twelve thousand, one hundred eleven".