1111211112021 has 8 divisors (see below), whose sum is σ = 1499465597280. Its totient is φ = 731882017392.

The previous prime is 1111211112017. The next prime is 1111211112029. The reversal of 1111211112021 is 1202111121111.

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

It is not a de Polignac number, because 1111211112021 - 2² = 1111211112017 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1111211112029) 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, 2231347366 + ... + 2231347863.

It is an arithmetic number, because the mean of its divisors is an integer number (187433199660).

Almost surely, 2^{1111211112021} is an apocalyptic number.

It is an amenable number.

1111211112021 is a deficient number, since it is larger than the sum of its proper divisors (388254485259).

1111211112021 is an equidigital number, since it uses as much as digits as its factorization.

1111211112021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4462695315.

The product of its (nonzero) digits is 8, while the sum is 15.

Adding to 1111211112021 its reverse (1202111121111), we get a palindrome (2313322233132).

The spelling of 1111211112021 in words is "one trillion, one hundred eleven billion, two hundred eleven million, one hundred twelve thousand, twenty-one".