100011321221 has 16 divisors (see below), whose sum is σ = 118620253440. Its totient is φ = 82501802880.

The previous prime is 100011321211. The next prime is 100011321247. The reversal of 100011321221 is 122123110001.

It is a de Polignac number, because none of the positive numbers 2^k-100011321221 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 100011321196 and 100011321205.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (100011321211) 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, 728936 + ... + 855201.

It is an arithmetic number, because the mean of its divisors is an integer number (7413765840).

Almost surely, 2^100011321221 is an apocalyptic number.

It is an amenable number.

100011321221 is a deficient number, since it is larger than the sum of its proper divisors (18608932219).

100011321221 is a wasteful number, since it uses less digits than its factorization.

100011321221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1584484.

The product of its (nonzero) digits is 24, while the sum is 14.

Adding to 100011321221 its reverse (122123110001), we get a palindrome (222134431222).

The spelling of 100011321221 in words is "one hundred billion, eleven million, three hundred twenty-one thousand, two hundred twenty-one".