102021102011 has 4 divisors (see below), whose sum is σ = 102021740832. Its totient is φ = 102020463192.

The previous prime is 102021101999. The next prime is 102021102041. The reversal of 102021102011 is 110201120201.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 110201120201 = 61 ⋅1806575741.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-102021102011 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 102021101983 and 102021102001.

It is not an unprimeable number, because it can be changed into a prime (102021102041) 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, 157781 + ... + 478473.

It is an arithmetic number, because the mean of its divisors is an integer number (25505435208).

Almost surely, 2^102021102011 is an apocalyptic number.

102021102011 is a deficient number, since it is larger than the sum of its proper divisors (638821).

102021102011 is an equidigital number, since it uses as much as digits as its factorization.

102021102011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 638820.

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

Adding to 102021102011 its reverse (110201120201), we get a palindrome (212222222212).

The spelling of 102021102011 in words is "one hundred two billion, twenty-one million, one hundred two thousand, eleven".