100121012102121 has 4 divisors (see below), whose sum is σ = 133494682802832. Its totient is φ = 66747341401412.

The previous prime is 100121012102101. The next prime is 100121012102131. The reversal of 100121012102121 is 121201210121001.

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 100121012102121 - 2¹¹ = 100121012100073 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 100121012102121.

It is not an unprimeable number, because it can be changed into a prime (100121012102101) 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, 16686835350351 + ... + 16686835350356.

It is an arithmetic number, because the mean of its divisors is an integer number (33373670700708).

Almost surely, 2^{100121012102121} is an apocalyptic number.

It is an amenable number.

100121012102121 is a deficient number, since it is larger than the sum of its proper divisors (33373670700711).

100121012102121 is an equidigital number, since it uses as much as digits as its factorization.

100121012102121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33373670700710.

The product of its (nonzero) digits is 16, while the sum is 15.

Adding to 100121012102121 its reverse (121201210121001), we get a palindrome (221322222223122).

The spelling of 100121012102121 in words is "one hundred trillion, one hundred twenty-one billion, twelve million, one hundred two thousand, one hundred twenty-one".