1101222021 has 32 divisors (see below), whose sum is σ = 1537024000. Its totient is φ = 700539840.

The previous prime is 1101221987. The next prime is 1101222047. The reversal of 1101222021 is 1202221011.

It is not a de Polignac number, because 1101222021 - 2⁹ = 1101221509 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1101221988 and 1101222006.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1101222071) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2905410 + ... + 2905788.

It is an arithmetic number, because the mean of its divisors is an integer number (48032000).

Almost surely, 2^1101222021 is an apocalyptic number.

It is an amenable number.

1101222021 is a deficient number, since it is larger than the sum of its proper divisors (435801979).

1101222021 is a wasteful number, since it uses less digits than its factorization.

1101222021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 769.

The product of its (nonzero) digits is 16, while the sum is 12.

The square root of 1101222021 is about 33184.6654495717. The cubic root of 1101222021 is about 1032.6622370120.

Adding to 1101222021 its reverse (1202221011), we get a palindrome (2303443032).

It can be divided in two parts, 11012 and 22021, that added together give a palindrome (33033).

The spelling of 1101222021 in words is "one billion, one hundred one million, two hundred twenty-two thousand, twenty-one".