1100021221123 has 16 divisors (see below), whose sum is σ = 1225341229536. Its totient is φ = 979120880640.

The previous prime is 1100021221081. The next prime is 1100021221129. The reversal of 1100021221123 is 3211221200011.

It is a cyclic number.

It is not a de Polignac number, because 1100021221123 - 2¹³ = 1100021212931 is a prime.

It is a super-2 number, since 2×1100021221123² (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 = 1100021221097 and 1100021221106.

It is not an unprimeable number, because it can be changed into a prime (1100021221129) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4889586 + ... + 5109607.

It is an arithmetic number, because the mean of its divisors is an integer number (76583826846).

Almost surely, 2^{1100021221123} is an apocalyptic number.

1100021221123 is a deficient number, since it is larger than the sum of its proper divisors (125320008413).

1100021221123 is a wasteful number, since it uses less digits than its factorization.

1100021221123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9999414.

The product of its (nonzero) digits is 48, while the sum is 16.

Adding to 1100021221123 its reverse (3211221200011), we get a palindrome (4311242421134).

The spelling of 1100021221123 in words is "one trillion, one hundred billion, twenty-one million, two hundred twenty-one thousand, one hundred twenty-three".