212123012 has 12 divisors (see below), whose sum is σ = 380269596. Its totient is φ = 103474560.

The previous prime is 212123003. The next prime is 212123029. The reversal of 212123012 is 210321212.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 24049216 + 188073796 = 4904^2 + 13714^2 .

It is an alternating number because its digits alternate between even and odd.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 646553 + ... + 646880.

It is an arithmetic number, because the mean of its divisors is an integer number (31689133).

Almost surely, 2^212123012 is an apocalyptic number.

It is an amenable number.

212123012 is a deficient number, since it is larger than the sum of its proper divisors (168146584).

212123012 is a wasteful number, since it uses less digits than its factorization.

212123012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1293478 (or 1293476 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 14.

The square root of 212123012 is about 14564.4434153867. The cubic root of 212123012 is about 596.3885017117.

Adding to 212123012 its reverse (210321212), we get a palindrome (422444224).

The spelling of 212123012 in words is "two hundred twelve million, one hundred twenty-three thousand, twelve".