212001212121023 has 4 divisors (see below), whose sum is σ = 228308997668808. Its totient is φ = 195693426573240.

The previous prime is 212001212121019. The next prime is 212001212121067. The reversal of 212001212121023 is 320121212100212.

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 212001212121023 - 2² = 212001212121019 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 212001212120986 and 212001212121004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (212001212121323) 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, 8153892773873 + ... + 8153892773898.

It is an arithmetic number, because the mean of its divisors is an integer number (57077249417202).

Almost surely, 2^{212001212121023} is an apocalyptic number.

212001212121023 is a deficient number, since it is larger than the sum of its proper divisors (16307785547785).

212001212121023 is a wasteful number, since it uses less digits than its factorization.

212001212121023 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16307785547784.

The product of its (nonzero) digits is 192, while the sum is 20.

Adding to 212001212121023 its reverse (320121212100212), we get a palindrome (532122424221235).

The spelling of 212001212121023 in words is "two hundred twelve trillion, one billion, two hundred twelve million, one hundred twenty-one thousand, twenty-three".