212103203012123 has 4 divisors (see below), whose sum is σ = 212609415907560. Its totient is φ = 211596990116688.

The previous prime is 212103203012119. The next prime is 212103203012149. The reversal of 212103203012123 is 321210302301212.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 212103203012123 - 2² = 212103203012119 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (212103203042123) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 253106447090 + ... + 253106447927.

It is an arithmetic number, because the mean of its divisors is an integer number (53152353976890).

Almost surely, 2^{212103203012123} is an apocalyptic number.

212103203012123 is a deficient number, since it is larger than the sum of its proper divisors (506212895437).

212103203012123 is an equidigital number, since it uses as much as digits as its factorization.

212103203012123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 506212895436.

The product of its (nonzero) digits is 864, while the sum is 23.

Adding to 212103203012123 its reverse (321210302301212), we get a palindrome (533313505313335).

The spelling of 212103203012123 in words is "two hundred twelve trillion, one hundred three billion, two hundred three million, twelve thousand, one hundred twenty-three".