100001023222221 has 64 divisors (see below), whose sum is σ = 163582276515840. Its totient is φ = 59870161912320.

The previous prime is 100001023222213. The next prime is 100001023222249. The reversal of 100001023222221 is 122222320100001.

It is not a de Polignac number, because 100001023222221 - 2³ = 100001023222213 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 100001023222194 and 100001023222203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (100001023222021) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 238831576 + ... + 239249918.

It is an arithmetic number, because the mean of its divisors is an integer number (2555973070560).

Almost surely, 2^{100001023222221} is an apocalyptic number.

100001023222221 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

100001023222221 is a deficient number, since it is larger than the sum of its proper divisors (63581253293619).

100001023222221 is a wasteful number, since it uses less digits than its factorization.

100001023222221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 428143 (or 428137 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 18.

Adding to 100001023222221 its reverse (122222320100001), we get a palindrome (222223343322222).

The spelling of 100001023222221 in words is "one hundred trillion, one billion, twenty-three million, two hundred twenty-two thousand, two hundred twenty-one".