210020012111121 has 8 divisors (see below), whose sum is σ = 281228514072480. Its totient is φ = 139412425778592.

The previous prime is 210020012111083. The next prime is 210020012111197. The reversal of 210020012111121 is 121111210020012.

It is a happy number.

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

It is not a de Polignac number, because 210020012111121 - 2³⁵ = 209985652372753 is a prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 210020012111121.

It is not an unprimeable number, because it can be changed into a prime (210020012181121) 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 7 ways as a sum of consecutive naturals, for example, 150228906391 + ... + 150228907788.

It is an arithmetic number, because the mean of its divisors is an integer number (35153564259060).

Almost surely, 2^{210020012111121} is an apocalyptic number.

It is an amenable number.

210020012111121 is a deficient number, since it is larger than the sum of its proper divisors (71208501961359).

210020012111121 is a wasteful number, since it uses less digits than its factorization.

210020012111121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 300457814415.

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

Adding to 210020012111121 its reverse (121111210020012), we get a palindrome (331131222131133).

The spelling of 210020012111121 in words is "two hundred ten trillion, twenty billion, twelve million, one hundred eleven thousand, one hundred twenty-one".