20211210112001 has 4 divisors (see below), whose sum is σ = 20211368782404. Its totient is φ = 20211051441600.

The previous prime is 20211210111941. The next prime is 20211210112013. The reversal of 20211210112001 is 10021101211202.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 13249126804225 + 6962083307776 = 3639935^2 + 2638576^2 .

It is a cyclic number.

It is not a de Polignac number, because 20211210112001 - 2¹⁰ = 20211210110977 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20211210112021) 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, 79143980 + ... + 79398941.

It is an arithmetic number, because the mean of its divisors is an integer number (5052842195601).

Almost surely, 2^{20211210112001} is an apocalyptic number.

It is an amenable number.

20211210112001 is a deficient number, since it is larger than the sum of its proper divisors (158670403).

20211210112001 is a wasteful number, since it uses less digits than its factorization.

20211210112001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 158670402.

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

Adding to 20211210112001 its reverse (10021101211202), we get a palindrome (30232311323203).

The spelling of 20211210112001 in words is "twenty trillion, two hundred eleven billion, two hundred ten million, one hundred twelve thousand, one".