211222232101 has 4 divisors (see below), whose sum is σ = 211223222604. Its totient is φ = 211221241600.

The previous prime is 211222232093. The next prime is 211222232113. The reversal of 211222232101 is 101232222112.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 99130522500 + 112091709601 = 314850^2 + 334801^2 .

It is a cyclic number.

It is not a de Polignac number, because 211222232101 - 2³ = 211222232093 is a prime.

It is a super-2 number, since 2×211222232101² (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 (211222236101) 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, 29170 + ... + 650611.

It is an arithmetic number, because the mean of its divisors is an integer number (52805805651).

Almost surely, 2^211222232101 is an apocalyptic number.

It is an amenable number.

211222232101 is a deficient number, since it is larger than the sum of its proper divisors (990503).

211222232101 is an equidigital number, since it uses as much as digits as its factorization.

211222232101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 990502.

The product of its (nonzero) digits is 192, while the sum is 19.

Adding to 211222232101 its reverse (101232222112), we get a palindrome (312454454213).

The spelling of 211222232101 in words is "two hundred eleven billion, two hundred twenty-two million, two hundred thirty-two thousand, one hundred one".