1222121011 has 8 divisors (see below), whose sum is σ = 1250677584. Its totient is φ = 1193768160.

The previous prime is 1222121009. The next prime is 1222121027. The reversal of 1222121011 is 1101212221.

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 1222121011 - 2¹ = 1222121009 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1222120982 and 1222121000.

It is not an unprimeable number, because it can be changed into a prime (1222121081) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 38760 + ... + 62821.

It is an arithmetic number, because the mean of its divisors is an integer number (156334698).

Almost surely, 2^1222121011 is an apocalyptic number.

1222121011 is a deficient number, since it is larger than the sum of its proper divisors (28556573).

1222121011 is a wasteful number, since it uses less digits than its factorization.

1222121011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 101861.

The product of its (nonzero) digits is 16, while the sum is 13.

The square root of 1222121011 is about 34958.8473923269. The cubic root of 1222121011 is about 1069.1485965958.

Adding to 1222121011 its reverse (1101212221), we get a palindrome (2323333232).

The spelling of 1222121011 in words is "one billion, two hundred twenty-two million, one hundred twenty-one thousand, eleven".