10021011121 has 8 divisors (see below), whose sum is σ = 11044714464. Its totient is φ = 9016091520.

The previous prime is 10021011109. The next prime is 10021011127. The reversal of 10021011121 is 12111012001.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 10021011121 - 2⁵ = 10021011089 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 10021011098 and 10021011107.

It is not an unprimeable number, because it can be changed into a prime (10021011127) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4694815 + ... + 4696948.

It is an arithmetic number, because the mean of its divisors is an integer number (1380589308).

Almost surely, 2^10021011121 is an apocalyptic number.

10021011121 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

10021011121 is a deficient number, since it is larger than the sum of its proper divisors (1023703343).

10021011121 is an equidigital number, since it uses as much as digits as its factorization.

10021011121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9391871.

The product of its (nonzero) digits is 4, while the sum is 10.

Adding to 10021011121 its reverse (12111012001), we get a palindrome (22132023122).

The spelling of 10021011121 in words is "ten billion, twenty-one million, eleven thousand, one hundred twenty-one".