10021111011121 has 4 divisors (see below), whose sum is σ = 11452698298432. Its totient is φ = 8589523723812.

The previous prime is 10021111011077. The next prime is 10021111011133. The reversal of 10021111011121 is 12111011112001.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 10021111011121 - 2⁹ = 10021111010609 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (10021111014121) 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, 715793643645 + ... + 715793643658.

It is an arithmetic number, because the mean of its divisors is an integer number (2863174574608).

Almost surely, 2^{10021111011121} is an apocalyptic number.

It is an amenable number.

10021111011121 is a deficient number, since it is larger than the sum of its proper divisors (1431587287311).

10021111011121 is an equidigital number, since it uses as much as digits as its factorization.

10021111011121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1431587287310.

The product of its (nonzero) digits is 4, while the sum is 13.

Adding to 10021111011121 its reverse (12111011112001), we get a palindrome (22132122123122).

The spelling of 10021111011121 in words is "ten trillion, twenty-one billion, one hundred eleven million, eleven thousand, one hundred twenty-one".