202111221289 has 2 divisors, whose sum is σ = 202111221290. Its totient is φ = 202111221288.

The previous prime is 202111221287. The next prime is 202111221329. The reversal of 202111221289 is 982122111202.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 150026852889 + 52084368400 = 387333^2 + 228220^2 .

It is a cyclic number.

It is not a de Polignac number, because 202111221289 - 2¹ = 202111221287 is a prime.

It is a super-2 number, since 2×202111221289² (a number of 23 digits) contains 22 as substring.

Together with 202111221287, it forms a pair of twin primes.

It is a self number, because there is not a number n which added to its sum of digits gives 202111221289.

It is not a weakly prime, because it can be changed into another prime (202111221287) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 101055610644 + 101055610645.

It is an arithmetic number, because the mean of its divisors is an integer number (101055610645).

Almost surely, 2^202111221289 is an apocalyptic number.

It is an amenable number.

202111221289 is a deficient number, since it is larger than the sum of its proper divisors (1).

202111221289 is an equidigital number, since it uses as much as digits as its factorization.

202111221289 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2304, while the sum is 31.

The spelling of 202111221289 in words is "two hundred two billion, one hundred eleven million, two hundred twenty-one thousand, two hundred eighty-nine".