20212102221202 has 4 divisors (see below), whose sum is σ = 30318153331806. Its totient is φ = 10106051110600.

The previous prime is 20212102221169. The next prime is 20212102221209. The reversal of 20212102221202 is 20212220121202.

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., 18707969223441 + 1504132997761 = 4325271^2 + 1226431^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 20212102221202.

It is not an unprimeable number, because it can be changed into a prime (20212102221209) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5053025555299 + ... + 5053025555302.

Almost surely, 2^{20212102221202} is an apocalyptic number.

20212102221202 is a deficient number, since it is larger than the sum of its proper divisors (10106051110604).

20212102221202 is a wasteful number, since it uses less digits than its factorization.

20212102221202 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10106051110603.

The product of its (nonzero) digits is 256, while the sum is 19.

Adding to 20212102221202 its reverse (20212220121202), we get a palindrome (40424322342404).

The spelling of 20212102221202 in words is "twenty trillion, two hundred twelve billion, one hundred two million, two hundred twenty-one thousand, two hundred two".