212221233020989 has 2 divisors, whose sum is σ = 212221233020990. Its totient is φ = 212221233020988.

The previous prime is 212221233020983. The next prime is 212221233021047. The reversal of 212221233020989 is 989020332122212.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 118112511089764 + 94108721931225 = 10867958^2 + 9700965^2 .

It is a cyclic number.

It is not a de Polignac number, because 212221233020989 - 2²¹ = 212221230923837 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (212221233020983) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106110616510494 + 106110616510495.

It is an arithmetic number, because the mean of its divisors is an integer number (106110616510495).

Almost surely, 2^{212221233020989} is an apocalyptic number.

It is an amenable number.

212221233020989 is a deficient number, since it is larger than the sum of its proper divisors (1).

212221233020989 is an equidigital number, since it uses as much as digits as its factorization.

212221233020989 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 373248, while the sum is 46.

The spelling of 212221233020989 in words is "two hundred twelve trillion, two hundred twenty-one billion, two hundred thirty-three million, twenty thousand, nine hundred eighty-nine".