212100003 has 12 divisors (see below), whose sum is σ = 307641048. Its totient is φ = 140811840.

The previous prime is 212099981. The next prime is 212100017. The reversal of 212100003 is 300001212.

It is a happy number.

It is not a de Polignac number, because 212100003 - 2⁸ = 212099747 is a prime.

It is a super-2 number, since 2×212100003² = 89972822545200018, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (9).

It is not an unprimeable number, because it can be changed into a prime (212100023) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 46725 + ... + 51062.

It is an arithmetic number, because the mean of its divisors is an integer number (25636754).

Almost surely, 2^212100003 is an apocalyptic number.

212100003 is a deficient number, since it is larger than the sum of its proper divisors (95541045).

212100003 is a wasteful number, since it uses less digits than its factorization.

212100003 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 98034 (or 98031 counting only the distinct ones).

The product of its (nonzero) digits is 12, while the sum is 9.

The square root of 212100003 is about 14563.6534907969. The cubic root of 212100003 is about 596.3669374960.

Adding to 212100003 its reverse (300001212), we get a palindrome (512101215).

The spelling of 212100003 in words is "two hundred twelve million, one hundred thousand, three".