102021121121011 has 4 divisors (see below), whose sum is σ = 108022363539912. Its totient is φ = 96019878702112.

The previous prime is 102021121120967. The next prime is 102021121121027. The reversal of 102021121121011 is 110121121120201.

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 102021121121011 - 2²⁵ = 102021087566579 is a prime.

It is a super-2 number, since 2×102021121121011² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (102021121121071) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3000621209425 + ... + 3000621209458.

It is an arithmetic number, because the mean of its divisors is an integer number (27005590884978).

Almost surely, 2^{102021121121011} is an apocalyptic number.

102021121121011 is a deficient number, since it is larger than the sum of its proper divisors (6001242418901).

102021121121011 is an equidigital number, since it uses as much as digits as its factorization.

102021121121011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6001242418900.

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

Adding to 102021121121011 its reverse (110121121120201), we get a palindrome (212142242241212).

The spelling of 102021121121011 in words is "one hundred two trillion, twenty-one billion, one hundred twenty-one million, one hundred twenty-one thousand, eleven".