2121222200989 has 2 divisors, whose sum is σ = 2121222200990. Its totient is φ = 2121222200988.

The previous prime is 2121222200987. The next prime is 2121222201001. The reversal of 2121222200989 is 9890022221212.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1320564108964 + 800658092025 = 1149158^2 + 894795^2 .

It is a cyclic number.

It is not a de Polignac number, because 2121222200989 - 2¹ = 2121222200987 is a prime.

Together with 2121222200987, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2121222200987) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1060611100494 + 1060611100495.

It is an arithmetic number, because the mean of its divisors is an integer number (1060611100495).

Almost surely, 2^{2121222200989} is an apocalyptic number.

It is an amenable number.

2121222200989 is a deficient number, since it is larger than the sum of its proper divisors (1).

2121222200989 is an equidigital number, since it uses as much as digits as its factorization.

2121222200989 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 41472, while the sum is 40.

The spelling of 2121222200989 in words is "two trillion, one hundred twenty-one billion, two hundred twenty-two million, two hundred thousand, nine hundred eighty-nine".