1021111120121 has 8 divisors (see below), whose sum is σ = 1055420889600. Its totient is φ = 986887019520.

The previous prime is 1021111120103. The next prime is 1021111120123. The reversal of 1021111120121 is 1210211111201.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1021111120121 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1021111120096 and 1021111120105.

It is not an unprimeable number, because it can be changed into a prime (1021111120123) 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, 21392981 + ... + 21440658.

It is an arithmetic number, because the mean of its divisors is an integer number (131927611200).

Almost surely, 2^{1021111120121} is an apocalyptic number.

It is an amenable number.

1021111120121 is a deficient number, since it is larger than the sum of its proper divisors (34309769479).

1021111120121 is an equidigital number, since it uses as much as digits as its factorization.

1021111120121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42834439.

The product of its (nonzero) digits is 8, while the sum is 14.

Adding to 1021111120121 its reverse (1210211111201), we get a palindrome (2231322231322).

The spelling of 1021111120121 in words is "one trillion, twenty-one billion, one hundred eleven million, one hundred twenty thousand, one hundred twenty-one".