210121242101243 has 16 divisors (see below), whose sum is σ = 242776254672000. Its totient is φ = 179731499164800.

The previous prime is 210121242101231. The next prime is 210121242101339. The reversal of 210121242101243 is 342101242121012.

It is not a de Polignac number, because 210121242101243 - 2¹⁰ = 210121242100219 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (210121242101443) 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, 159911993 + ... + 161220618.

It is an arithmetic number, because the mean of its divisors is an integer number (15173515917000).

Almost surely, 2^{210121242101243} is an apocalyptic number.

210121242101243 is a deficient number, since it is larger than the sum of its proper divisors (32655012570757).

210121242101243 is a wasteful number, since it uses less digits than its factorization.

210121242101243 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 321136138.

The product of its (nonzero) digits is 1536, while the sum is 26.

Adding to 210121242101243 its reverse (342101242121012), we get a palindrome (552222484222255).

The spelling of 210121242101243 in words is "two hundred ten trillion, one hundred twenty-one billion, two hundred forty-two million, one hundred one thousand, two hundred forty-three".