102021020111 has 8 divisors (see below), whose sum is σ = 103358611440. Its totient is φ = 100686010432.

The previous prime is 102021020099. The next prime is 102021020161. The reversal of 102021020111 is 111020120201.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-102021020111 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 102021020092 and 102021020101.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (102021020161) 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, 565796 + ... + 723993.

It is an arithmetic number, because the mean of its divisors is an integer number (12919826430).

Almost surely, 2^102021020111 is an apocalyptic number.

102021020111 is a deficient number, since it is larger than the sum of its proper divisors (1337591329).

102021020111 is an equidigital number, since it uses as much as digits as its factorization.

102021020111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1290825.

The product of its (nonzero) digits is 8, while the sum is 11.

Adding to 102021020111 its reverse (111020120201), we get a palindrome (213041140312).

The spelling of 102021020111 in words is "one hundred two billion, twenty-one million, twenty thousand, one hundred eleven".