10011131221 has 8 divisors (see below), whose sum is σ = 12321392384. Its totient is φ = 7920894960.

The previous prime is 10011131201. The next prime is 10011131231. The reversal of 10011131221 is 12213111001.

It is a happy number.

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 10011131221 - 2⁹ = 10011130709 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (13).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10011131201) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 55006125 + ... + 55006306.

It is an arithmetic number, because the mean of its divisors is an integer number (1540174048).

Almost surely, 2^10011131221 is an apocalyptic number.

It is an amenable number.

10011131221 is a deficient number, since it is larger than the sum of its proper divisors (2310261163).

10011131221 is a wasteful number, since it uses less digits than its factorization.

10011131221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 110012451.

The product of its (nonzero) digits is 12, while the sum is 13.

Adding to 10011131221 its reverse (12213111001), we get a palindrome (22224242222).

The spelling of 10011131221 in words is "ten billion, eleven million, one hundred thirty-one thousand, two hundred twenty-one".