10011101221 has 8 divisors (see below), whose sum is σ = 10922522688. Its totient is φ = 9099900000.

The previous prime is 10011101209. The next prime is 10011101227. The reversal of 10011101221 is 12210111001.

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 10011101221 - 2⁵ = 10011101189 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 10011101198 and 10011101207.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10011101227) 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, 48456 + ... + 149566.

It is an arithmetic number, because the mean of its divisors is an integer number (1365315336).

Almost surely, 2^10011101221 is an apocalyptic number.

10011101221 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

10011101221 is a deficient number, since it is larger than the sum of its proper divisors (911421467).

10011101221 is a wasteful number, since it uses less digits than its factorization.

10011101221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 110123.

The product of its (nonzero) digits is 4, while the sum is 10.

Adding to 10011101221 its reverse (12210111001), we get a palindrome (22221212222).

The spelling of 10011101221 in words is "ten billion, eleven million, one hundred one thousand, two hundred twenty-one".