102020021111311 has 4 divisors (see below), whose sum is σ = 105537952873800. Its totient is φ = 98502089348824.

The previous prime is 102020021111299. The next prime is 102020021111339. The reversal of 102020021111311 is 113111120020201.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 102020021111311 - 2²⁷ = 102019886893583 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (102020021111381) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1758965881201 + ... + 1758965881258.

It is an arithmetic number, because the mean of its divisors is an integer number (26384488218450).

Almost surely, 2^{102020021111311} is an apocalyptic number.

102020021111311 is a deficient number, since it is larger than the sum of its proper divisors (3517931762489).

102020021111311 is an equidigital number, since it uses as much as digits as its factorization.

102020021111311 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3517931762488.

The product of its (nonzero) digits is 24, while the sum is 16.

Adding to 102020021111311 its reverse (113111120020201), we get a palindrome (215131141131512).

The spelling of 102020021111311 in words is "one hundred two trillion, twenty billion, twenty-one million, one hundred eleven thousand, three hundred eleven".