100021221121121 has 8 divisors (see below), whose sum is σ = 100693418760000. Its totient is φ = 99349035672880.

The previous prime is 100021221121103. The next prime is 100021221121141. The reversal of 100021221121121 is 121121122120001.

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 100021221121121 - 2¹⁰ = 100021221120097 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 100021221121121.

It is not an unprimeable number, because it can be changed into a prime (100021221121141) 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, 13726166 + ... + 19709136.

It is an arithmetic number, because the mean of its divisors is an integer number (12586677345000).

Almost surely, 2^{100021221121121} is an apocalyptic number.

It is an amenable number.

100021221121121 is a deficient number, since it is larger than the sum of its proper divisors (672197638879).

100021221121121 is a wasteful number, since it uses less digits than its factorization.

100021221121121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6095319.

The product of its (nonzero) digits is 32, while the sum is 17.

Adding to 100021221121121 its reverse (121121122120001), we get a palindrome (221142343241122).

The spelling of 100021221121121 in words is "one hundred trillion, twenty-one billion, two hundred twenty-one million, one hundred twenty-one thousand, one hundred twenty-one".