100121222202101 has 4 divisors (see below), whose sum is σ = 100122901668972. Its totient is φ = 100119542735232.

The previous prime is 100121222202013. The next prime is 100121222202193. The reversal of 100121222202101 is 101202222121001.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 61172326983076 + 38948895219025 = 7821274^2 + 6240905^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-100121222202101 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 100121222202101.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (100121222202601) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 839644010 + ... + 839763243.

It is an arithmetic number, because the mean of its divisors is an integer number (25030725417243).

Almost surely, 2^{100121222202101} is an apocalyptic number.

It is an amenable number.

100121222202101 is a deficient number, since it is larger than the sum of its proper divisors (1679466871).

100121222202101 is an equidigital number, since it uses as much as digits as its factorization.

100121222202101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1679466870.

The product of its (nonzero) digits is 64, while the sum is 17.

Adding to 100121222202101 its reverse (101202222121001), we get a palindrome (201323444323102).

The spelling of 100121222202101 in words is "one hundred trillion, one hundred twenty-one billion, two hundred twenty-two million, two hundred two thousand, one hundred one".