21211101201 has 16 divisors (see below), whose sum is σ = 29201899520. Its totient is φ = 13680772560.

The previous prime is 21211101199. The next prime is 21211101209. The reversal of 21211101201 is 10210111212.

It is not a de Polignac number, because 21211101201 - 2¹ = 21211101199 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21211101209) 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, 325710 + ... + 385368.

It is an arithmetic number, because the mean of its divisors is an integer number (1825118720).

Almost surely, 2^21211101201 is an apocalyptic number.

It is an amenable number.

21211101201 is a deficient number, since it is larger than the sum of its proper divisors (7990798319).

21211101201 is a wasteful number, since it uses less digits than its factorization.

21211101201 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 63516.

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

Adding to 21211101201 its reverse (10210111212), we get a palindrome (31421212413).

The spelling of 21211101201 in words is "twenty-one billion, two hundred eleven million, one hundred one thousand, two hundred one".