1021111122121 has 8 divisors (see below), whose sum is σ = 1056333643200. Its totient is φ = 985889387280.

The previous prime is 1021111122113. The next prime is 1021111122127. The reversal of 1021111122121 is 1212211111201.

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 1021111122121 - 2³ = 1021111122113 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1021111122095 and 1021111122104.

It is not an unprimeable number, because it can be changed into a prime (1021111122127) 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, 3876550 + ... + 4131568.

It is an arithmetic number, because the mean of its divisors is an integer number (132041705400).

Almost surely, 2^{1021111122121} is an apocalyptic number.

It is an amenable number.

1021111122121 is a deficient number, since it is larger than the sum of its proper divisors (35222521079).

1021111122121 is a wasteful number, since it uses less digits than its factorization.

1021111122121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 393119.

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

Adding to 1021111122121 its reverse (1212211111201), we get a palindrome (2233322233322).

The spelling of 1021111122121 in words is "one trillion, twenty-one billion, one hundred eleven million, one hundred twenty-two thousand, one hundred twenty-one".