80102921 has 2 divisors, whose sum is σ = 80102922. Its totient is φ = 80102920.

The previous prime is 80102909. The next prime is 80102969. The reversal of 80102921 is 12920108.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 74149321 + 5953600 = 8611^2 + 2440^2 .

It is a cyclic number.

It is not a de Polignac number, because 80102921 - 2¹⁰ = 80101897 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (80152921) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 40051460 + 40051461.

It is an arithmetic number, because the mean of its divisors is an integer number (40051461).

Almost surely, 2^80102921 is an apocalyptic number.

It is an amenable number.

80102921 is a deficient number, since it is larger than the sum of its proper divisors (1).

80102921 is an equidigital number, since it uses as much as digits as its factorization.

80102921 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 80102921 is about 8950.0235195222. The cubic root of 80102921 is about 431.0716392994.

The spelling of 80102921 in words is "eighty million, one hundred two thousand, nine hundred twenty-one".