212210121021 has 8 divisors (see below), whose sum is σ = 282953850240. Its totient is φ = 141469902912.

The previous prime is 212210121017. The next prime is 212210121031. The reversal of 212210121021 is 120121012212.

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

It is not a de Polignac number, because 212210121021 - 2² = 212210121017 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (212210121031) 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, 733356 + ... + 980933.

It is an arithmetic number, because the mean of its divisors is an integer number (35369231280).

Almost surely, 2^212210121021 is an apocalyptic number.

It is an amenable number.

212210121021 is a deficient number, since it is larger than the sum of its proper divisors (70743729219).

212210121021 is a wasteful number, since it uses less digits than its factorization.

212210121021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1755555.

The product of its (nonzero) digits is 32, while the sum is 15.

Adding to 212210121021 its reverse (120121012212), we get a palindrome (332331133233).

The spelling of 212210121021 in words is "two hundred twelve billion, two hundred ten million, one hundred twenty-one thousand, twenty-one".