102021111013 has 4 divisors (see below), whose sum is σ = 102023958348. Its totient is φ = 102018263680.

The previous prime is 102021110993. The next prime is 102021111029. The reversal of 102021111013 is 310111120201.

It is a happy number.

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

It can be written as a sum of positive squares in 2 ways, for example, as 424648449 + 101596462564 = 20607^2 + 318742^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-102021111013 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 102021110984 and 102021111002.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (102021112013) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1369228 + ... + 1441813.

It is an arithmetic number, because the mean of its divisors is an integer number (25505989587).

Almost surely, 2^102021111013 is an apocalyptic number.

It is an amenable number.

102021111013 is a deficient number, since it is larger than the sum of its proper divisors (2847335).

102021111013 is an equidigital number, since it uses as much as digits as its factorization.

102021111013 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2847334.

The product of its (nonzero) digits is 12, while the sum is 13.

Adding to 102021111013 its reverse (310111120201), we get a palindrome (412132231214).

The spelling of 102021111013 in words is "one hundred two billion, twenty-one million, one hundred eleven thousand, thirteen".