221020111220002 has 4 divisors (see below), whose sum is σ = 331530166830006. Its totient is φ = 110510055610000.

The previous prime is 221020111219987. The next prime is 221020111220011. The reversal of 221020111220002 is 200022111020122.

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., 120021249287241 + 100998861932761 = 10955421^2 + 10049819^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 55255027804999 + ... + 55255027805002.

Almost surely, 2^{221020111220002} is an apocalyptic number.

221020111220002 is a deficient number, since it is larger than the sum of its proper divisors (110510055610004).

221020111220002 is a wasteful number, since it uses less digits than its factorization.

221020111220002 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 110510055610003.

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

Adding to 221020111220002 its reverse (200022111020122), we get a palindrome (421042222240124).

The spelling of 221020111220002 in words is "two hundred twenty-one trillion, twenty billion, one hundred eleven million, two hundred twenty thousand, two".