10102021091 has 2 divisors, whose sum is σ = 10102021092. Its totient is φ = 10102021090.

The previous prime is 10102021087. The next prime is 10102021117. The reversal of 10102021091 is 19012020101.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 10102021091 - 2² = 10102021087 is a prime.

It is not a weakly prime, because it can be changed into another prime (10102021001) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5051010545 + 5051010546.

It is an arithmetic number, because the mean of its divisors is an integer number (5051010546).

Almost surely, 2^10102021091 is an apocalyptic number.

10102021091 is a deficient number, since it is larger than the sum of its proper divisors (1).

10102021091 is an equidigital number, since it uses as much as digits as its factorization.

10102021091 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 36, while the sum is 17.

Adding to 10102021091 its reverse (19012020101), we get a palindrome (29114041192).

The spelling of 10102021091 in words is "ten billion, one hundred two million, twenty-one thousand, ninety-one".