11002220021221 has 32 divisors (see below), whose sum is σ = 14281063872768. Its totient is φ = 8311730211840.

The previous prime is 11002220021213. The next prime is 11002220021231. The reversal of 11002220021221 is 12212002220011.

It is a happy number.

It is not a de Polignac number, because 11002220021221 - 2³ = 11002220021213 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 11002220021195 and 11002220021204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11002220021231) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 98331046 + ... + 98442871.

It is an arithmetic number, because the mean of its divisors is an integer number (446283246024).

Almost surely, 2^{11002220021221} is an apocalyptic number.

11002220021221 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

11002220021221 is a deficient number, since it is larger than the sum of its proper divisors (3278843851547).

11002220021221 is a wasteful number, since it uses less digits than its factorization.

11002220021221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 196773981.

The product of its (nonzero) digits is 64, while the sum is 16.

Adding to 11002220021221 its reverse (12212002220011), we get a palindrome (23214222241232).

The spelling of 11002220021221 in words is "eleven trillion, two billion, two hundred twenty million, twenty-one thousand, two hundred twenty-one".