100121111222021 has 4 divisors (see below), whose sum is σ = 100197018055200. Its totient is φ = 100045204388844.

The previous prime is 100121111222009. The next prime is 100121111222113. The reversal of 100121111222021 is 120222111121001.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 100121111222021 - 2¹⁰ = 100121111220997 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (100121111242021) 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, 37953414611 + ... + 37953417248.

It is an arithmetic number, because the mean of its divisors is an integer number (25049254513800).

Almost surely, 2^{100121111222021} is an apocalyptic number.

It is an amenable number.

100121111222021 is a deficient number, since it is larger than the sum of its proper divisors (75906833179).

100121111222021 is an equidigital number, since it uses as much as digits as its factorization.

100121111222021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 75906833178.

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

Adding to 100121111222021 its reverse (120222111121001), we get a palindrome (220343222343022).

The spelling of 100121111222021 in words is "one hundred trillion, one hundred twenty-one billion, one hundred eleven million, two hundred twenty-two thousand, twenty-one".