2211221121231 has 8 divisors (see below), whose sum is σ = 2948901367984. Its totient is φ = 1473844144320.

The previous prime is 2211221121199. The next prime is 2211221121233. The reversal of 2211221121231 is 1321211221122.

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

It is not a de Polignac number, because 2211221121231 - 2⁵ = 2211221121199 is a prime.

It is a super-2 number, since 2×2211221121231² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2211221121198 and 2211221121207.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2211221121233) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 75800446 + ... + 75829611.

It is an arithmetic number, because the mean of its divisors is an integer number (368612670998).

Almost surely, 2^{2211221121231} is an apocalyptic number.

2211221121231 is a deficient number, since it is larger than the sum of its proper divisors (737680246753).

2211221121231 is a wasteful number, since it uses less digits than its factorization.

2211221121231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 151634921.

The product of its digits is 192, while the sum is 21.

Adding to 2211221121231 its reverse (1321211221122), we get a palindrome (3532432342353).

The spelling of 2211221121231 in words is "two trillion, two hundred eleven billion, two hundred twenty-one million, one hundred twenty-one thousand, two hundred thirty-one".