1111021111021 has 8 divisors (see below), whose sum is σ = 1134726618240. Its totient is φ = 1087318385568.

The previous prime is 1111021111007. The next prime is 1111021111027. The reversal of 1111021111021 is 1201111201111.

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 1111021111021 - 2⁹ = 1111021110509 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1111021110992 and 1111021111010.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1111021111027) 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, 122010 + ... + 1495636.

It is an arithmetic number, because the mean of its divisors is an integer number (141840827280).

Almost surely, 2^{1111021111021} is an apocalyptic number.

It is an amenable number.

1111021111021 is a deficient number, since it is larger than the sum of its proper divisors (23705507219).

1111021111021 is a wasteful number, since it uses less digits than its factorization.

1111021111021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1390883.

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

Adding to 1111021111021 its reverse (1201111201111), we get a palindrome (2312132312132).

The spelling of 1111021111021 in words is "one trillion, one hundred eleven billion, twenty-one million, one hundred eleven thousand, twenty-one".