212202121202 has 4 divisors (see below), whose sum is σ = 318303181806. Its totient is φ = 106101060600.

The previous prime is 212202121177. The next prime is 212202121253. The reversal of 212202121202 is 202121202212.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 145436212321 + 66765908881 = 381361^2 + 258391^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 53050530299 + ... + 53050530302.

Almost surely, 2^212202121202 is an apocalyptic number.

212202121202 is a deficient number, since it is larger than the sum of its proper divisors (106101060604).

212202121202 is a wasteful number, since it uses less digits than its factorization.

212202121202 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 106101060603.

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

Adding to 212202121202 its reverse (202121202212), we get a palindrome (414323323414).

It can be divided in two parts, 212 and 202121202, that multiplied together give a palindrome (42849694824).

The spelling of 212202121202 in words is "two hundred twelve billion, two hundred two million, one hundred twenty-one thousand, two hundred two".