210202111212123 has 16 divisors (see below), whose sum is σ = 289936710957600. Its totient is φ = 135301218286080.

The previous prime is 210202111211977. The next prime is 210202111212131. The reversal of 210202111212123 is 321212111202012.

It is not a de Polignac number, because 210202111212123 - 2⁸ = 210202111211867 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 210202111212123.

It is not an unprimeable number, because it can be changed into a prime (210202111211123) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (31) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2299488 + ... + 20632301.

It is an arithmetic number, because the mean of its divisors is an integer number (18121044434850).

Almost surely, 2^{210202111212123} is an apocalyptic number.

210202111212123 is a deficient number, since it is larger than the sum of its proper divisors (79734599745477).

210202111212123 is a wasteful number, since it uses less digits than its factorization.

210202111212123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23037182.

The product of its (nonzero) digits is 192, while the sum is 21.

Adding to 210202111212123 its reverse (321212111202012), we get a palindrome (531414222414135).

The spelling of 210202111212123 in words is "two hundred ten trillion, two hundred two billion, one hundred eleven million, two hundred twelve thousand, one hundred twenty-three".