210123322312121 has 16 divisors (see below), whose sum is σ = 213042699652608. Its totient is φ = 207221681289600.

The previous prime is 210123322312109. The next prime is 210123322312139. The reversal of 210123322312121 is 121213223321012.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-210123322312121 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (210123322342121) 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, 2143169861 + ... + 2143267901.

It is an arithmetic number, because the mean of its divisors is an integer number (13315168728288).

Almost surely, 2^{210123322312121} is an apocalyptic number.

It is an amenable number.

210123322312121 is a deficient number, since it is larger than the sum of its proper divisors (2919377340487).

210123322312121 is a wasteful number, since it uses less digits than its factorization.

210123322312121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 188192.

The product of its (nonzero) digits is 1728, while the sum is 26.

Adding to 210123322312121 its reverse (121213223321012), we get a palindrome (331336545633133).

The spelling of 210123322312121 in words is "two hundred ten trillion, one hundred twenty-three billion, three hundred twenty-two million, three hundred twelve thousand, one hundred twenty-one".