100001220222121 has 8 divisors (see below), whose sum is σ = 100341769190400. Its totient is φ = 99661249928448.

The previous prime is 100001220222073. The next prime is 100001220222173. The reversal of 100001220222121 is 121222022100001.

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 100001220222121 - 2³¹ = 99999072738473 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 100001220222095 and 100001220222104.

It is not an unprimeable number, because it can be changed into a prime (100001220292121) 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, 144322441 + ... + 145013686.

It is an arithmetic number, because the mean of its divisors is an integer number (12542721148800).

Almost surely, 2^{100001220222121} is an apocalyptic number.

It is an amenable number.

100001220222121 is a deficient number, since it is larger than the sum of its proper divisors (340548968279).

100001220222121 is an equidigital number, since it uses as much as digits as its factorization.

100001220222121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 289337303.

The product of its (nonzero) digits is 64, while the sum is 16.

Adding to 100001220222121 its reverse (121222022100001), we get a palindrome (221223242322122).

The spelling of 100001220222121 in words is "one hundred trillion, one billion, two hundred twenty million, two hundred twenty-two thousand, one hundred twenty-one".