212111201101 has 4 divisors (see below), whose sum is σ = 212615028604. Its totient is φ = 211607373600.

The previous prime is 212111201069. The next prime is 212111201119. The reversal of 212111201101 is 101102111212.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 51698935876 + 160412265225 = 227374^2 + 400515^2 .

It is a cyclic number.

It is not a de Polignac number, because 212111201101 - 2⁵ = 212111201069 is a prime.

It is a super-2 number, since 2×212111201101² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (212111201161) 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, 251913120 + ... + 251913961.

It is an arithmetic number, because the mean of its divisors is an integer number (53153757151).

Almost surely, 2^212111201101 is an apocalyptic number.

It is an amenable number.

212111201101 is a deficient number, since it is larger than the sum of its proper divisors (503827503).

212111201101 is an equidigital number, since it uses as much as digits as its factorization.

212111201101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 503827502.

The product of its (nonzero) digits is 8, while the sum is 13.

Adding to 212111201101 its reverse (101102111212), we get a palindrome (313213312313).

The spelling of 212111201101 in words is "two hundred twelve billion, one hundred eleven million, two hundred one thousand, one hundred one".