212020123 has 16 divisors (see below), whose sum is σ = 244813824. Its totient is φ = 179864640.

The previous prime is 212020111. The next prime is 212020139. The reversal of 212020123 is 321020212.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-212020123 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (212020103) 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, 463711 + ... + 464167.

It is an arithmetic number, because the mean of its divisors is an integer number (15300864).

Almost surely, 2^212020123 is an apocalyptic number.

212020123 is a deficient number, since it is larger than the sum of its proper divisors (32793701).

212020123 is a wasteful number, since it uses less digits than its factorization.

212020123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1002.

The product of its (nonzero) digits is 48, while the sum is 13.

The square root of 212020123 is about 14560.9107888209. The cubic root of 212020123 is about 596.2920612239.

Adding to 212020123 its reverse (321020212), we get a palindrome (533040335).

The spelling of 212020123 in words is "two hundred twelve million, twenty thousand, one hundred twenty-three".