212012122021 has 8 divisors (see below), whose sum is σ = 244698574464. Its totient is φ = 179925421200.

The previous prime is 212012121991. The next prime is 212012122043. The reversal of 212012122021 is 120221210212.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 212012122021 - 2²³ = 212003733413 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 212012121986 and 212012122004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (212012122121) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 149937145 + ... + 149938558.

It is an arithmetic number, because the mean of its divisors is an integer number (30587321808).

Almost surely, 2^212012122021 is an apocalyptic number.

It is an amenable number.

212012122021 is a deficient number, since it is larger than the sum of its proper divisors (32686452443).

212012122021 is a wasteful number, since it uses less digits than its factorization.

212012122021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 299875811.

The product of its (nonzero) digits is 64, while the sum is 16.

Adding to 212012122021 its reverse (120221210212), we get a palindrome (332233332233).

The spelling of 212012122021 in words is "two hundred twelve billion, twelve million, one hundred twenty-two thousand, twenty-one".