102021112121011 has 4 divisors (see below), whose sum is σ = 102021139871224. Its totient is φ = 102021084370800.

The previous prime is 102021112121009. The next prime is 102021112121039. The reversal of 102021112121011 is 110121211120201.

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

It is a cyclic number.

It is not a de Polignac number, because 102021112121011 - 2¹ = 102021112121009 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (102021112121611) 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, 7331970 + ... + 16056151.

It is an arithmetic number, because the mean of its divisors is an integer number (25505284967806).

Almost surely, 2^{102021112121011} is an apocalyptic number.

102021112121011 is a deficient number, since it is larger than the sum of its proper divisors (27750213).

102021112121011 is an equidigital number, since it uses as much as digits as its factorization.

102021112121011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27750212.

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

Adding to 102021112121011 its reverse (110121211120201), we get a palindrome (212142323241212).

The spelling of 102021112121011 in words is "one hundred two trillion, twenty-one billion, one hundred twelve million, one hundred twenty-one thousand, eleven".