202221111021091 has 2 divisors, whose sum is σ = 202221111021092. Its totient is φ = 202221111021090.

The previous prime is 202221111021077. The next prime is 202221111021101. The reversal of 202221111021091 is 190120111122202.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 202221111021091 - 2¹¹ = 202221111019043 is a prime.

It is not a weakly prime, because it can be changed into another prime (202221111021191) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 101110555510545 + 101110555510546.

It is an arithmetic number, because the mean of its divisors is an integer number (101110555510546).

Almost surely, 2^{202221111021091} is an apocalyptic number.

202221111021091 is a deficient number, since it is larger than the sum of its proper divisors (1).

202221111021091 is an equidigital number, since it uses as much as digits as its factorization.

202221111021091 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 288, while the sum is 25.

Adding to 202221111021091 its reverse (190120111122202), we get a palindrome (392341222143293).

The spelling of 202221111021091 in words is "two hundred two trillion, two hundred twenty-one billion, one hundred eleven million, twenty-one thousand, ninety-one".