212001221903 has 2 divisors, whose sum is σ = 212001221904. Its totient is φ = 212001221902.

The previous prime is 212001221863. The next prime is 212001221923. The reversal of 212001221903 is 309122100212.

It is a happy number.

212001221903 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-212001221903 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (212001221923) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106000610951 + 106000610952.

It is an arithmetic number, because the mean of its divisors is an integer number (106000610952).

Almost surely, 2^212001221903 is an apocalyptic number.

212001221903 is a deficient number, since it is larger than the sum of its proper divisors (1).

212001221903 is an equidigital number, since it uses as much as digits as its factorization.

212001221903 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 432, while the sum is 23.

The spelling of 212001221903 in words is "two hundred twelve billion, one million, two hundred twenty-one thousand, nine hundred three".