102021311 has 8 divisors (see below), whose sum is σ = 118072320. Its totient is φ = 86339448.

The previous prime is 102021299. The next prime is 102021329. The reversal of 102021311 is 113120201.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 102021311 - 2¹⁸ = 101759167 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 102021292 and 102021301.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (102021511) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 91691 + ... + 92796.

It is an arithmetic number, because the mean of its divisors is an integer number (14759040).

Almost surely, 2^102021311 is an apocalyptic number.

102021311 is a deficient number, since it is larger than the sum of its proper divisors (16051009).

102021311 is an equidigital number, since it uses as much as digits as its factorization.

102021311 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 184573.

The product of its (nonzero) digits is 12, while the sum is 11.

The square root of 102021311 is about 10100.5599349739. The cubic root of 102021311 is about 467.2654104381.

Adding to 102021311 its reverse (113120201), we get a palindrome (215141512).

The spelling of 102021311 in words is "one hundred two million, twenty-one thousand, three hundred eleven".