211221002039 has 2 divisors, whose sum is σ = 211221002040. Its totient is φ = 211221002038.

The previous prime is 211221001993. The next prime is 211221002051. The reversal of 211221002039 is 930200122112.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 211221002039 - 2¹⁶ = 211220936503 is a prime.

It is a super-2 number, since 2×211221002039² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (211221002089) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 105610501019 + 105610501020.

It is an arithmetic number, because the mean of its divisors is an integer number (105610501020).

Almost surely, 2^211221002039 is an apocalyptic number.

211221002039 is a deficient number, since it is larger than the sum of its proper divisors (1).

211221002039 is an equidigital number, since it uses as much as digits as its factorization.

211221002039 is an evil number, because the sum of its binary digits is even.

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

The spelling of 211221002039 in words is "two hundred eleven billion, two hundred twenty-one million, two thousand, thirty-nine".