1111211010021 has 8 divisors (see below), whose sum is σ = 1693273920064. Its totient is φ = 634977720000.

The previous prime is 1111211010011. The next prime is 1111211010029. The reversal of 1111211010021 is 1200101121111.

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

It is not a de Polignac number, because 1111211010021 - 2¹³ = 1111211001829 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1111211009979 and 1111211010006.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1111211010029) 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, 26457404980 + ... + 26457405021.

It is an arithmetic number, because the mean of its divisors is an integer number (211659240008).

Almost surely, 2^{1111211010021} is an apocalyptic number.

It is an amenable number.

1111211010021 is a deficient number, since it is larger than the sum of its proper divisors (582062910043).

1111211010021 is an equidigital number, since it uses as much as digits as its factorization.

1111211010021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 52914810011.

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

Adding to 1111211010021 its reverse (1200101121111), we get a palindrome (2311312131132).

The spelling of 1111211010021 in words is "one trillion, one hundred eleven billion, two hundred eleven million, ten thousand, twenty-one".