100121101020121 has 4 divisors (see below), whose sum is σ = 100141825740544. Its totient is φ = 100100376299700.

The previous prime is 100121101020107. The next prime is 100121101020133. The reversal of 100121101020121 is 121020101121001.

It is a happy number.

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 100121101020121 - 2¹¹ = 100121101018073 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (100121101020151) 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, 10362352965 + ... + 10362362626.

It is an arithmetic number, because the mean of its divisors is an integer number (25035456435136).

Almost surely, 2^{100121101020121} is an apocalyptic number.

It is an amenable number.

100121101020121 is a deficient number, since it is larger than the sum of its proper divisors (20724720423).

100121101020121 is an equidigital number, since it uses as much as digits as its factorization.

100121101020121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20724720422.

The product of its (nonzero) digits is 8, while the sum is 13.

Adding to 100121101020121 its reverse (121020101121001), we get a palindrome (221141202141122).

The spelling of 100121101020121 in words is "one hundred trillion, one hundred twenty-one billion, one hundred one million, twenty thousand, one hundred twenty-one".