10011021221 has 8 divisors (see below), whose sum is σ = 10384165440. Its totient is φ = 9644255712.

The previous prime is 10011021211. The next prime is 10011021259. The reversal of 10011021221 is 12212011001.

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 10011021221 - 2⁶ = 10011021157 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10011021211) 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, 1591481 + ... + 1597758.

It is an arithmetic number, because the mean of its divisors is an integer number (1298020680).

Almost surely, 2^10011021221 is an apocalyptic number.

It is an amenable number.

10011021221 is a deficient number, since it is larger than the sum of its proper divisors (373144219).

10011021221 is an equidigital number, since it uses as much as digits as its factorization.

10011021221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3189355.

The product of its (nonzero) digits is 8, while the sum is 11.

Adding to 10011021221 its reverse (12212011001), we get a palindrome (22223032222).

The spelling of 10011021221 in words is "ten billion, eleven million, twenty-one thousand, two hundred twenty-one".