212222121101 has 2 divisors, whose sum is σ = 212222121102. Its totient is φ = 212222121100.

The previous prime is 212222120993. The next prime is 212222121107. The reversal of 212222121101 is 101121222212.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 120579090025 + 91643031076 = 347245^2 + 302726^2 .

It is a cyclic number.

It is not a de Polignac number, because 212222121101 - 2²² = 212217926797 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 212222121101.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (212222121107) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106111060550 + 106111060551.

It is an arithmetic number, because the mean of its divisors is an integer number (106111060551).

Almost surely, 2^212222121101 is an apocalyptic number.

It is an amenable number.

212222121101 is a deficient number, since it is larger than the sum of its proper divisors (1).

212222121101 is an equidigital number, since it uses as much as digits as its factorization.

212222121101 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 64, while the sum is 17.

Adding to 212222121101 its reverse (101121222212), we get a palindrome (313343343313).

The spelling of 212222121101 in words is "two hundred twelve billion, two hundred twenty-two million, one hundred twenty-one thousand, one hundred one".