213021222989 has 2 divisors, whose sum is σ = 213021222990. Its totient is φ = 213021222988.

The previous prime is 213021222971. The next prime is 213021223001. The reversal of 213021222989 is 989222120312.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 179140562500 + 33880660489 = 423250^2 + 184067^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-213021222989 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (213021222929) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106510611494 + 106510611495.

It is an arithmetic number, because the mean of its divisors is an integer number (106510611495).

Almost surely, 2^213021222989 is an apocalyptic number.

It is an amenable number.

213021222989 is a deficient number, since it is larger than the sum of its proper divisors (1).

213021222989 is an equidigital number, since it uses as much as digits as its factorization.

213021222989 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 62208, while the sum is 41.

The spelling of 213021222989 in words is "two hundred thirteen billion, twenty-one million, two hundred twenty-two thousand, nine hundred eighty-nine".