212111001002 has 16 divisors (see below), whose sum is σ = 336891939912. Its totient is φ = 99814049280.

The previous prime is 212111001001. The next prime is 212111001029. The reversal of 212111001002 is 200100111212.

It can be written as a sum of positive squares in 4 ways, for example, as 183227658601 + 28883342401 = 428051^2 + 169951^2 .

It is not an unprimeable number, because it can be changed into a prime (212111001001) by changing a digit.

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, 1511828 + ... + 1646160.

Almost surely, 2^212111001002 is an apocalyptic number.

212111001002 is a deficient number, since it is larger than the sum of its proper divisors (124780938910).

212111001002 is a wasteful number, since it uses less digits than its factorization.

212111001002 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 180793.

The product of its (nonzero) digits is 8, while the sum is 11.

Adding to 212111001002 its reverse (200100111212), we get a palindrome (412211112214).

The spelling of 212111001002 in words is "two hundred twelve billion, one hundred eleven million, one thousand, two".