212123030302 has 4 divisors (see below), whose sum is σ = 318184545456. Its totient is φ = 106061515150.

The previous prime is 212123030297. The next prime is 212123030311. The reversal of 212123030302 is 203030321212.

It is a semiprime because it is the product of two primes.

It is a super-2 number, since 2×212123030302² (a number of 23 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 212123030302.

It is a congruent number.

It is an unprimeable number.

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 as a sum of consecutive naturals, namely, 53030757574 + ... + 53030757577.

It is an arithmetic number, because the mean of its divisors is an integer number (79546136364).

Almost surely, 2^212123030302 is an apocalyptic number.

212123030302 is a deficient number, since it is larger than the sum of its proper divisors (106061515154).

212123030302 is a wasteful number, since it uses less digits than its factorization.

212123030302 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 106061515153.

The product of its (nonzero) digits is 432, while the sum is 19.

Adding to 212123030302 its reverse (203030321212), we get a palindrome (415153351514).

The spelling of 212123030302 in words is "two hundred twelve billion, one hundred twenty-three million, thirty thousand, three hundred two".