211342122 has 20 divisors (see below), whose sum is σ = 473563266. Its totient is φ = 70447320.

The previous prime is 211342121. The next prime is 211342123. The reversal of 211342122 is 221243112.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (211342121) and next prime (211342123).

It can be written as a sum of positive squares in only one way, i.e., 184932801 + 26409321 = 13599^2 + 5139^2 .

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 211342095 and 211342104.

It is not an unprimeable number, because it can be changed into a prime (211342121) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 652129 + ... + 652452.

Almost surely, 2^211342122 is an apocalyptic number.

211342122 is an abundant number, since it is smaller than the sum of its proper divisors (262221144).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

211342122 is a wasteful number, since it uses less digits than its factorization.

211342122 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1304595 (or 1304586 counting only the distinct ones).

The product of its digits is 192, while the sum is 18.

The square root of 211342122 is about 14537.6106014709. The cubic root of 211342122 is about 595.6557720519.

Adding to 211342122 its reverse (221243112), we get a palindrome (432585234).

The spelling of 211342122 in words is "two hundred eleven million, three hundred forty-two thousand, one hundred twenty-two".