221020212201202 has 4 divisors (see below), whose sum is σ = 331530318301806. Its totient is φ = 110510106100600.

The previous prime is 221020212201199. The next prime is 221020212201233. The reversal of 221020212201202 is 202102212020122.

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., 130313845729081 + 90706366472121 = 11415509^2 + 9523989^2 .

It is a super-2 number, since 2×221020212201202² (a number of 29 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 221020212201202.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 55255053050299 + ... + 55255053050302.

Almost surely, 2^{221020212201202} is an apocalyptic number.

221020212201202 is a deficient number, since it is larger than the sum of its proper divisors (110510106100604).

221020212201202 is a wasteful number, since it uses less digits than its factorization.

221020212201202 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 110510106100603.

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

Adding to 221020212201202 its reverse (202102212020122), we get a palindrome (423122424221324).

The spelling of 221020212201202 in words is "two hundred twenty-one trillion, twenty billion, two hundred twelve million, two hundred one thousand, two hundred two".