212030020123 has 4 divisors (see below), whose sum is σ = 212036500240. Its totient is φ = 212023540008.

The previous prime is 212030020061. The next prime is 212030020133. The reversal of 212030020123 is 321020030212.

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 212030020123 - 2³³ = 203440085531 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 212030020097 and 212030020106.

It is not an unprimeable number, because it can be changed into a prime (212030020133) 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, 3190728 + ... + 3256501.

It is an arithmetic number, because the mean of its divisors is an integer number (53009125060).

Almost surely, 2^212030020123 is an apocalyptic number.

212030020123 is a deficient number, since it is larger than the sum of its proper divisors (6480117).

212030020123 is an equidigital number, since it uses as much as digits as its factorization.

212030020123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6480116.

The product of its (nonzero) digits is 144, while the sum is 16.

Adding to 212030020123 its reverse (321020030212), we get a palindrome (533050050335).

The spelling of 212030020123 in words is "two hundred twelve billion, thirty million, twenty thousand, one hundred twenty-three".