221020001211202 has 4 divisors (see below), whose sum is σ = 331530001816806. Its totient is φ = 110510000605600.

The previous prime is 221020001211187. The next prime is 221020001211239. The reversal of 221020001211202 is 202112100020122.

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., 166264751908161 + 54755249303041 = 12894369^2 + 7399679^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 55255000302799 + ... + 55255000302802.

Almost surely, 2^{221020001211202} is an apocalyptic number.

221020001211202 is a deficient number, since it is larger than the sum of its proper divisors (110510000605604).

221020001211202 is a wasteful number, since it uses less digits than its factorization.

221020001211202 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 110510000605603.

The product of its (nonzero) digits is 64, while the sum is 16.

Adding to 221020001211202 its reverse (202112100020122), we get a palindrome (423132101231324).

The spelling of 221020001211202 in words is "two hundred twenty-one trillion, twenty billion, one million, two hundred eleven thousand, two hundred two".