21020112011001 has 32 divisors (see below), whose sum is σ = 28339653574656. Its totient is φ = 13857342840000.

The previous prime is 21020112010999. The next prime is 21020112011033. The reversal of 21020112011001 is 10011021102012.

It is not a de Polignac number, because 21020112011001 - 2¹ = 21020112010999 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21020112011051) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2380259656 + ... + 2380268486.

It is an arithmetic number, because the mean of its divisors is an integer number (885614174208).

Almost surely, 2^{21020112011001} is an apocalyptic number.

It is an amenable number.

21020112011001 is a deficient number, since it is larger than the sum of its proper divisors (7319541563655).

21020112011001 is a wasteful number, since it uses less digits than its factorization.

21020112011001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17853.

The product of its (nonzero) digits is 8, while the sum is 12.

Adding to 21020112011001 its reverse (10011021102012), we get a palindrome (31031133113013).

The spelling of 21020112011001 in words is "twenty-one trillion, twenty billion, one hundred twelve million, eleven thousand, one".