21112101210201 has 16 divisors (see below), whose sum is σ = 28279085709504. Its totient is φ = 14010031586304.

The previous prime is 21112101210199. The next prime is 21112101210217. The reversal of 21112101210201 is 10201210121112.

It is a happy number.

It is not a de Polignac number, because 21112101210201 - 2¹ = 21112101210199 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21112101210901) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 12473976 + ... + 14065001.

It is an arithmetic number, because the mean of its divisors is an integer number (1767442856844).

Almost surely, 2^{21112101210201} is an apocalyptic number.

It is an amenable number.

21112101210201 is a deficient number, since it is larger than the sum of its proper divisors (7166984499303).

21112101210201 is a wasteful number, since it uses less digits than its factorization.

21112101210201 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26540200.

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

Adding to 21112101210201 its reverse (10201210121112), we get a palindrome (31313311331313).

The spelling of 21112101210201 in words is "twenty-one trillion, one hundred twelve billion, one hundred one million, two hundred ten thousand, two hundred one".