221220000001202 has 4 divisors (see below), whose sum is σ = 331830000001806. Its totient is φ = 110610000000600.

The previous prime is 221220000001177. The next prime is 221220000001249. The reversal of 221220000001202 is 202100000022122.

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., 136891427403721 + 84328572597481 = 11700061^2 + 9183059^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 55305000000299 + ... + 55305000000302.

Almost surely, 2^{221220000001202} is an apocalyptic number.

221220000001202 is a deficient number, since it is larger than the sum of its proper divisors (110610000000604).

221220000001202 is a wasteful number, since it uses less digits than its factorization.

221220000001202 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 110610000000603.

The product of its (nonzero) digits is 64, while the sum is 14.

Adding to 221220000001202 its reverse (202100000022122), we get a palindrome (423320000023324).

The spelling of 221220000001202 in words is "two hundred twenty-one trillion, two hundred twenty billion, one thousand, two hundred two".