100121210102021 has 16 divisors (see below), whose sum is σ = 102407376902400. Its totient is φ = 97860799608000.

The previous prime is 100121210102003. The next prime is 100121210102047. The reversal of 100121210102021 is 120201012121001.

It is not a de Polignac number, because 100121210102021 - 2¹⁰ = 100121210100997 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 100121210101987 and 100121210102005.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (100121210102051) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 53894366 + ... + 55721136.

It is an arithmetic number, because the mean of its divisors is an integer number (6400461056400).

Almost surely, 2^{100121210102021} is an apocalyptic number.

It is an amenable number.

100121210102021 is a deficient number, since it is larger than the sum of its proper divisors (2286166800379).

100121210102021 is a wasteful number, since it uses less digits than its factorization.

100121210102021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1833820.

The product of its (nonzero) digits is 16, while the sum is 14.

Adding to 100121210102021 its reverse (120201012121001), we get a palindrome (220322222223022).

The spelling of 100121210102021 in words is "one hundred trillion, one hundred twenty-one billion, two hundred ten million, one hundred two thousand, twenty-one".