210121120013 has 8 divisors (see below), whose sum is σ = 240142080960. Its totient is φ = 180101073600.

The previous prime is 210121120007. The next prime is 210121120019. The reversal of 210121120013 is 310021121012.

It is an interprime number because it is at equal distance from previous prime (210121120007) and next prime (210121120019).

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 210121120013 - 2¹⁴ = 210121103629 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 210121120013.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (210121120019) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 367253 + ... + 745061.

It is an arithmetic number, because the mean of its divisors is an integer number (30017760120).

Almost surely, 2^210121120013 is an apocalyptic number.

It is an amenable number.

210121120013 is a deficient number, since it is larger than the sum of its proper divisors (30020960947).

210121120013 is an equidigital number, since it uses as much as digits as its factorization.

210121120013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 457267.

The product of its (nonzero) digits is 24, while the sum is 14.

Adding to 210121120013 its reverse (310021121012), we get a palindrome (520142241025).

Subtracting 210121120013 from its reverse (310021121012), we obtain a palindrome (99900000999).

The spelling of 210121120013 in words is "two hundred ten billion, one hundred twenty-one million, one hundred twenty thousand, thirteen".