1100221121021 has 8 divisors (see below), whose sum is σ = 1200543826944. Its totient is φ = 999948849120.

The previous prime is 1100221121011. The next prime is 1100221121047. The reversal of 1100221121021 is 1201211220011.

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 1100221121021 - 2³⁸ = 825343214077 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1100221120987 and 1100221121005.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1100221121011) 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, 12562880 + ... + 12650153.

It is an arithmetic number, because the mean of its divisors is an integer number (150067978368).

Almost surely, 2^{1100221121021} is an apocalyptic number.

1100221121021 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1100221121021 is a deficient number, since it is larger than the sum of its proper divisors (100322705923).

1100221121021 is a wasteful number, since it uses less digits than its factorization.

1100221121021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25217011.

The product of its (nonzero) digits is 16, while the sum is 14.

Adding to 1100221121021 its reverse (1201211220011), we get a palindrome (2301432341032).

The spelling of 1100221121021 in words is "one trillion, one hundred billion, two hundred twenty-one million, one hundred twenty-one thousand, twenty-one".