210203121122120 has 64 divisors (see below), whose sum is σ = 540692987028480. Its totient is φ = 72046884784896.

The previous prime is 210203121122053. The next prime is 210203121122123. The reversal of 210203121122120 is 21221121302012.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a junction number, because it is equal to n+sod(n) for n = 210203121122092 and 210203121122101.

It is not an unprimeable number, because it can be changed into a prime (210203121122123) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 117636359 + ... + 119409878.

It is an arithmetic number, because the mean of its divisors is an integer number (8448327922320).

Almost surely, 2^{210203121122120} is an apocalyptic number.

210203121122120 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

210203121122120 is an abundant number, since it is smaller than the sum of its proper divisors (330489865906360).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

210203121122120 is a wasteful number, since it uses less digits than its factorization.

210203121122120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 237049422 (or 237049418 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 20.

Adding to 210203121122120 its reverse (21221121302012), we get a palindrome (231424242424132).

The spelling of 210203121122120 in words is "two hundred ten trillion, two hundred three billion, one hundred twenty-one million, one hundred twenty-two thousand, one hundred twenty".