102021221311111 has 32 divisors (see below), whose sum is σ = 106409144016000. Its totient is φ = 97694111004672.

The previous prime is 102021221311081. The next prime is 102021221311127. The reversal of 102021221311111 is 111113122120201.

It is a cyclic number.

It is not a de Polignac number, because 102021221311111 - 2⁹ = 102021221310599 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 (102021221311211) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 6583280715 + ... + 6583296211.

It is an arithmetic number, because the mean of its divisors is an integer number (3325285750500).

Almost surely, 2^{102021221311111} is an apocalyptic number.

102021221311111 is a deficient number, since it is larger than the sum of its proper divisors (4387922704889).

102021221311111 is a wasteful number, since it uses less digits than its factorization.

102021221311111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18651.

The product of its (nonzero) digits is 48, while the sum is 19.

Adding to 102021221311111 its reverse (111113122120201), we get a palindrome (213134343431312).

The spelling of 102021221311111 in words is "one hundred two trillion, twenty-one billion, two hundred twenty-one million, three hundred eleven thousand, one hundred eleven".