100121011212021 has 4 divisors (see below), whose sum is σ = 133494681616032. Its totient is φ = 66747340808012.

The previous prime is 100121011211993. The next prime is 100121011212031. The reversal of 100121011212021 is 120212110121001.

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 100121011212021 - 2¹⁷ = 100121011080949 is a prime.

It is a super-2 number, since 2×100121011212021² (a number of 29 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (100121011212031) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 16686835202001 + ... + 16686835202006.

It is an arithmetic number, because the mean of its divisors is an integer number (33373670404008).

Almost surely, 2^{100121011212021} is an apocalyptic number.

It is an amenable number.

100121011212021 is a deficient number, since it is larger than the sum of its proper divisors (33373670404011).

100121011212021 is an equidigital number, since it uses as much as digits as its factorization.

100121011212021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33373670404010.

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

Adding to 100121011212021 its reverse (120212110121001), we get a palindrome (220333121333022).

The spelling of 100121011212021 in words is "one hundred trillion, one hundred twenty-one billion, eleven million, two hundred twelve thousand, twenty-one".