210100121021 has 16 divisors (see below), whose sum is σ = 240354875904. Its totient is φ = 179905595184.

The previous prime is 210100121003. The next prime is 210100121039. The reversal of 210100121021 is 120121001012.

It is an interprime number because it is at equal distance from previous prime (210100121003) and next prime (210100121039).

It is not a de Polignac number, because 210100121021 - 2³⁰ = 209026379197 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 210100120993 and 210100121011.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (210100121041) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 48152786 + ... + 48157148.

It is an arithmetic number, because the mean of its divisors is an integer number (15022179744).

Almost surely, 2^210100121021 is an apocalyptic number.

It is an amenable number.

210100121021 is a deficient number, since it is larger than the sum of its proper divisors (30254754883).

210100121021 is a wasteful number, since it uses less digits than its factorization.

210100121021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9680.

The product of its (nonzero) digits is 8, while the sum is 11.

Adding to 210100121021 its reverse (120121001012), we get a palindrome (330221122033).

The spelling of 210100121021 in words is "two hundred ten billion, one hundred million, one hundred twenty-one thousand, twenty-one".