201212211101 has 4 divisors (see below), whose sum is σ = 219504230304. Its totient is φ = 182920191900.

The previous prime is 201212211061. The next prime is 201212211133. The reversal of 201212211101 is 101112212102.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 201212211101 - 2¹⁴ = 201212194717 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (201212211601) 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, 9146009585 + ... + 9146009606.

It is an arithmetic number, because the mean of its divisors is an integer number (54876057576).

Almost surely, 2^201212211101 is an apocalyptic number.

It is an amenable number.

201212211101 is a deficient number, since it is larger than the sum of its proper divisors (18292019203).

201212211101 is a wasteful number, since it uses less digits than its factorization.

201212211101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18292019202.

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

Adding to 201212211101 its reverse (101112212102), we get a palindrome (302324423203).

The spelling of 201212211101 in words is "two hundred one billion, two hundred twelve million, two hundred eleven thousand, one hundred one".