98102021 has 2 divisors, whose sum is σ = 98102022. Its totient is φ = 98102020.

The previous prime is 98102009. The next prime is 98102023. The reversal of 98102021 is 12020189.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 97022500 + 1079521 = 9850^2 + 1039^2 .

It is a cyclic number.

It is not a de Polignac number, because 98102021 - 2²² = 93907717 is a prime.

Together with 98102023, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (98102023) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 49051010 + 49051011.

It is an arithmetic number, because the mean of its divisors is an integer number (49051011).

Almost surely, 2^98102021 is an apocalyptic number.

It is an amenable number.

98102021 is a deficient number, since it is larger than the sum of its proper divisors (1).

98102021 is an equidigital number, since it uses as much as digits as its factorization.

98102021 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 288, while the sum is 23.

The square root of 98102021 is about 9904.6464348810. The cubic root of 98102021 is about 461.2035605647.

The spelling of 98102021 in words is "ninety-eight million, one hundred two thousand, twenty-one".