100021212089 has 2 divisors, whose sum is σ = 100021212090. Its totient is φ = 100021212088.

The previous prime is 100021212017. The next prime is 100021212097. The reversal of 100021212089 is 980212120001.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 97770658489 + 2250553600 = 312683^2 + 47440^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-100021212089 is a prime.

It is not a weakly prime, because it can be changed into another prime (100021212589) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 50010606044 + 50010606045.

It is an arithmetic number, because the mean of its divisors is an integer number (50010606045).

Almost surely, 2^100021212089 is an apocalyptic number.

It is an amenable number.

100021212089 is a deficient number, since it is larger than the sum of its proper divisors (1).

100021212089 is an equidigital number, since it uses as much as digits as its factorization.

100021212089 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 576, while the sum is 26.

The spelling of 100021212089 in words is "one hundred billion, twenty-one million, two hundred twelve thousand, eighty-nine".