212001111220101 has 32 divisors (see below), whose sum is σ = 329147156821248. Its totient is φ = 118856836200960.

The previous prime is 212001111220079. The next prime is 212001111220103. The reversal of 212001111220101 is 101022111100212.

It is a happy number.

It is not a de Polignac number, because 212001111220101 - 2¹⁰ = 212001111219077 is a prime.

It is a super-2 number, since 2×212001111220101² (a number of 29 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (212001111220103) 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 31 ways as a sum of consecutive naturals, for example, 156526935 + ... + 157875531.

It is an arithmetic number, because the mean of its divisors is an integer number (10285848650664).

Almost surely, 2^{212001111220101} is an apocalyptic number.

212001111220101 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

212001111220101 is a deficient number, since it is larger than the sum of its proper divisors (117146045601147).

212001111220101 is a wasteful number, since it uses less digits than its factorization.

212001111220101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1489901.

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

Adding to 212001111220101 its reverse (101022111100212), we get a palindrome (313023222320313).

The spelling of 212001111220101 in words is "two hundred twelve trillion, one billion, one hundred eleven million, two hundred twenty thousand, one hundred one".