212122021210 has 32 divisors (see below), whose sum is σ = 416549692800. Its totient is φ = 77131728960.

The previous prime is 212122021207. The next prime is 212122021219. The reversal of 212122021210 is 12120221212.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (212122021219) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4141236 + ... + 4192144.

It is an arithmetic number, because the mean of its divisors is an integer number (13017177900).

Almost surely, 2^212122021210 is an apocalyptic number.

212122021210 is a deficient number, since it is larger than the sum of its proper divisors (204427671590).

212122021210 is a wasteful number, since it uses less digits than its factorization.

212122021210 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 88806.

The product of its (nonzero) digits is 64, while the sum is 16.

Adding to 212122021210 its reverse (12120221212), we get a palindrome (224242242422).

The spelling of 212122021210 in words is "two hundred twelve billion, one hundred twenty-two million, twenty-one thousand, two hundred ten".