1121221321211 has 8 divisors (see below), whose sum is σ = 1134808012800. Its totient is φ = 1107636486952.

The previous prime is 1121221321159. The next prime is 1121221321229. The reversal of 1121221321211 is 1121231221211.

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 1121221321211 - 2¹⁸ = 1121221059067 is a prime.

It is a super-2 number, since 2×1121221321211² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1121221321111) 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, 770090 + ... + 1683888.

It is an arithmetic number, because the mean of its divisors is an integer number (141851001600).

Almost surely, 2^{1121221321211} is an apocalyptic number.

1121221321211 is a deficient number, since it is larger than the sum of its proper divisors (13586691589).

1121221321211 is an equidigital number, since it uses as much as digits as its factorization.

1121221321211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 928665.

The product of its digits is 96, while the sum is 20.

Adding to 1121221321211 its reverse (1121231221211), we get a palindrome (2242452542422).

The spelling of 1121221321211 in words is "one trillion, one hundred twenty-one billion, two hundred twenty-one million, three hundred twenty-one thousand, two hundred eleven".