212222212112146 has 4 divisors (see below), whose sum is σ = 318333318168222. Its totient is φ = 106111106056072.

The previous prime is 212222212112137. The next prime is 212222212112147. The reversal of 212222212112146 is 641211212222212.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 212009470697025 + 212741415121 = 14560545^2 + 461239^2 .

It is not an unprimeable number, because it can be changed into a prime (212222212112147) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 53055553028035 + ... + 53055553028038.

Almost surely, 2^{212222212112146} is an apocalyptic number.

212222212112146 is a deficient number, since it is larger than the sum of its proper divisors (106111106056076).

212222212112146 is a wasteful number, since it uses less digits than its factorization.

212222212112146 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 106111106056075.

The product of its digits is 6144, while the sum is 31.

Adding to 212222212112146 its reverse (641211212222212), we get a palindrome (853433424334358).

The spelling of 212222212112146 in words is "two hundred twelve trillion, two hundred twenty-two billion, two hundred twelve million, one hundred twelve thousand, one hundred forty-six".