102212101021091 has 2 divisors, whose sum is σ = 102212101021092. Its totient is φ = 102212101021090.

The previous prime is 102212101021087. The next prime is 102212101021223. The reversal of 102212101021091 is 190120101212201.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 102212101021091 - 2² = 102212101021087 is a prime.

It is not a weakly prime, because it can be changed into another prime (102212101021031) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 51106050510545 + 51106050510546.

It is an arithmetic number, because the mean of its divisors is an integer number (51106050510546).

Almost surely, 2^{102212101021091} is an apocalyptic number.

102212101021091 is a deficient number, since it is larger than the sum of its proper divisors (1).

102212101021091 is an equidigital number, since it uses as much as digits as its factorization.

102212101021091 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 144, while the sum is 23.

Adding to 102212101021091 its reverse (190120101212201), we get a palindrome (292332202233292).

The spelling of 102212101021091 in words is "one hundred two trillion, two hundred twelve billion, one hundred one million, twenty-one thousand, ninety-one".