212211442 has 8 divisors (see below), whose sum is σ = 337041756. Its totient is φ = 99864192.

The previous prime is 212211431. The next prime is 212211443. The reversal of 212211442 is 244112212.

212211442 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 209351961 + 2859481 = 14469^2 + 1691^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×212211442² = 90067392231438728, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (212211443) 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, 3120723 + ... + 3120790.

Almost surely, 2^212211442 is an apocalyptic number.

212211442 is a deficient number, since it is larger than the sum of its proper divisors (124830314).

212211442 is a wasteful number, since it uses less digits than its factorization.

212211442 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6241532.

The product of its digits is 256, while the sum is 19.

The square root of 212211442 is about 14567.4789170947. The cubic root of 212211442 is about 596.4713644932.

Adding to 212211442 its reverse (244112212), we get a palindrome (456323654).

The spelling of 212211442 in words is "two hundred twelve million, two hundred eleven thousand, four hundred forty-two".