100221110021 has 16 divisors (see below), whose sum is σ = 109991851776. Its totient is φ = 90940878336.

The previous prime is 100221109993. The next prime is 100221110051. The reversal of 100221110021 is 120011122001.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-100221110021 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 100221109984 and 100221110011.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (100221110051) 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, 882536 + ... + 989601.

It is an arithmetic number, because the mean of its divisors is an integer number (6874490736).

Almost surely, 2^100221110021 is an apocalyptic number.

It is an amenable number.

100221110021 is a deficient number, since it is larger than the sum of its proper divisors (9770741755).

100221110021 is a wasteful number, since it uses less digits than its factorization.

100221110021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1872268.

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

Adding to 100221110021 its reverse (120011122001), we get a palindrome (220232232022).

The spelling of 100221110021 in words is "one hundred billion, two hundred twenty-one million, one hundred ten thousand, twenty-one".