211221997003 has 2 divisors, whose sum is σ = 211221997004. Its totient is φ = 211221997002.

The previous prime is 211221996983. The next prime is 211221997013. The reversal of 211221997003 is 300799122112.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 211221997003 - 2³⁷ = 73783043531 is a prime.

It is a super-2 number, since 2×211221997003² (a number of 23 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (211221997013) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 105610998501 + 105610998502.

It is an arithmetic number, because the mean of its divisors is an integer number (105610998502).

Almost surely, 2^211221997003 is an apocalyptic number.

211221997003 is a deficient number, since it is larger than the sum of its proper divisors (1).

211221997003 is an equidigital number, since it uses as much as digits as its factorization.

211221997003 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 13608, while the sum is 37.

The spelling of 211221997003 in words is "two hundred eleven billion, two hundred twenty-one million, nine hundred ninety-seven thousand, three".