102021221011 has 4 divisors (see below), whose sum is σ = 102039370192. Its totient is φ = 102003071832.

The previous prime is 102021220979. The next prime is 102021221021. The reversal of 102021221011 is 110122120201.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 110122120201 = 4937 ⋅22305473.

It is a cyclic number.

It is not a de Polignac number, because 102021221011 - 2⁵ = 102021220979 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 102021220982 and 102021221000.

It is not an unprimeable number, because it can be changed into a prime (102021221021) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9066156 + ... + 9077401.

It is an arithmetic number, because the mean of its divisors is an integer number (25509842548).

Almost surely, 2^102021221011 is an apocalyptic number.

102021221011 is a deficient number, since it is larger than the sum of its proper divisors (18149181).

102021221011 is an equidigital number, since it uses as much as digits as its factorization.

102021221011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18149180.

The product of its (nonzero) digits is 16, while the sum is 13.

Adding to 102021221011 its reverse (110122120201), we get a palindrome (212143341212).

The spelling of 102021221011 in words is "one hundred two billion, twenty-one million, two hundred twenty-one thousand, eleven".