211212022 has 16 divisors (see below), whose sum is σ = 362269440. Its totient is φ = 90471528.

The previous prime is 211212019. The next prime is 211212091. The reversal of 211212022 is 220212112.

It is a happy number.

It is a super-2 number, since 2×211212022² = 89221036474656968, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 211211993 and 211212011.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 40479 + ... + 45397.

It is an arithmetic number, because the mean of its divisors is an integer number (22641840).

Almost surely, 2^211212022 is an apocalyptic number.

211212022 is a deficient number, since it is larger than the sum of its proper divisors (151057418).

211212022 is a wasteful number, since it uses less digits than its factorization.

211212022 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7995.

The product of its (nonzero) digits is 32, while the sum is 13.

The square root of 211212022 is about 14533.1353121066. The cubic root of 211212022 is about 595.5335204749.

Adding to 211212022 its reverse (220212112), we get a palindrome (431424134).

The spelling of 211212022 in words is "two hundred eleven million, two hundred twelve thousand, twenty-two".