212102121010 has 16 divisors (see below), whose sum is σ = 411151804056. Its totient is φ = 78314629248.

The previous prime is 212102120999. The next prime is 212102121017. The reversal of 212102121010 is 10121201212.

It can be written as a sum of positive squares in 4 ways, for example, as 191709995409 + 20392125601 = 437847^2 + 142801^2 .

It is a Harshad number since it is a multiple of its sum of digits (13).

It is not an unprimeable number, because it can be changed into a prime (212102121017) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 815777259 + ... + 815777518.

Almost surely, 2^212102121010 is an apocalyptic number.

212102121010 is a deficient number, since it is larger than the sum of its proper divisors (199049683046).

212102121010 is a wasteful number, since it uses less digits than its factorization.

212102121010 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1631554797.

The product of its (nonzero) digits is 16, while the sum is 13.

Adding to 212102121010 its reverse (10121201212), we get a palindrome (222223322222).

The spelling of 212102121010 in words is "two hundred twelve billion, one hundred two million, one hundred twenty-one thousand, ten".