1111021011021 has 4 divisors (see below), whose sum is σ = 1481361348032. Its totient is φ = 740680674012.

The previous prime is 1111021010977. The next prime is 1111021011031. The reversal of 1111021011021 is 1201101201111.

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 not a de Polignac number, because 1111021011021 - 2¹⁰ = 1111021009997 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1111021010988 and 1111021011006.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1111021011031) 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, 185170168501 + ... + 185170168506.

It is an arithmetic number, because the mean of its divisors is an integer number (370340337008).

Almost surely, 2^{1111021011021} is an apocalyptic number.

It is an amenable number.

1111021011021 is a deficient number, since it is larger than the sum of its proper divisors (370340337011).

1111021011021 is an equidigital number, since it uses as much as digits as its factorization.

1111021011021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 370340337010.

The product of its (nonzero) digits is 4, while the sum is 12.

Adding to 1111021011021 its reverse (1201101201111), we get a palindrome (2312122212132).

The spelling of 1111021011021 in words is "one trillion, one hundred eleven billion, twenty-one million, eleven thousand, twenty-one".