201212121011 has 24 divisors (see below), whose sum is σ = 230655503232. Its totient is φ = 175194201600.

The previous prime is 201212120999. The next prime is 201212121049. The reversal of 201212121011 is 110121212102.

It is not a de Polignac number, because 201212121011 - 2¹⁴ = 201212104627 is a prime.

It is not an unprimeable number, because it can be changed into a prime (201212121211) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 87341 + ... + 640353.

It is an arithmetic number, because the mean of its divisors is an integer number (9610645968).

Almost surely, 2^201212121011 is an apocalyptic number.

201212121011 is a deficient number, since it is larger than the sum of its proper divisors (29443382221).

201212121011 is a wasteful number, since it uses less digits than its factorization.

201212121011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 553163 (or 553152 counting only the distinct ones).

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

Adding to 201212121011 its reverse (110121212102), we get a palindrome (311333333113).

It can be divided in two parts, 20121212101 and 1, that added together give a palindrome (20121212102).

The spelling of 201212121011 in words is "two hundred one billion, two hundred twelve million, one hundred twenty-one thousand, eleven".