210123321123 has 32 divisors (see below), whose sum is σ = 290045028352. Its totient is φ = 135205200000.

The previous prime is 210123321101. The next prime is 210123321143. The reversal of 210123321123 is 321123321012.

It is not a de Polignac number, because 210123321123 - 2²¹ = 210121223971 is a prime.

It is a super-2 number, since 2×210123321123² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 210123321123.

It is not an unprimeable number, because it can be changed into a prime (210123321143) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 12579165 + ... + 12595857.

It is an arithmetic number, because the mean of its divisors is an integer number (9063907136).

Almost surely, 2^210123321123 is an apocalyptic number.

210123321123 is a deficient number, since it is larger than the sum of its proper divisors (79921707229).

210123321123 is a wasteful number, since it uses less digits than its factorization.

210123321123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17635.

The product of its (nonzero) digits is 432, while the sum is 21.

Adding to 210123321123 its reverse (321123321012), we get a palindrome (531246642135).

The spelling of 210123321123 in words is "two hundred ten billion, one hundred twenty-three million, three hundred twenty-one thousand, one hundred twenty-three".