212202120221 has 8 divisors (see below), whose sum is σ = 261171840384. Its totient is φ = 167896182960.

The previous prime is 212202120211. The next prime is 212202120253. The reversal of 212202120221 is 122021202212.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 212202120221 - 2⁶ = 212202120157 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 212202120221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (212202120211) 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, 1165945625 + ... + 1165945806.

It is an arithmetic number, because the mean of its divisors is an integer number (32646480048).

Almost surely, 2^212202120221 is an apocalyptic number.

It is an amenable number.

212202120221 is a deficient number, since it is larger than the sum of its proper divisors (48969720163).

212202120221 is a wasteful number, since it uses less digits than its factorization.

212202120221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2331891451.

The product of its (nonzero) digits is 128, while the sum is 17.

Adding to 212202120221 its reverse (122021202212), we get a palindrome (334223322433).

It can be divided in two parts, 2 and 12202120221, that multiplied together give a palindrome (24404240442).

The spelling of 212202120221 in words is "two hundred twelve billion, two hundred two million, one hundred twenty thousand, two hundred twenty-one".