221020110111002 has 16 divisors (see below), whose sum is σ = 353387858653800. Its totient is φ = 103311413488128.

The previous prime is 221020110110981. The next prime is 221020110111037. The reversal of 221020110111002 is 200111011020122.

It can be written as a sum of positive squares in 4 ways, for example, as 173609848379881 + 47410261731121 = 13176109^2 + 6885511^2 .

It is a super-2 number, since 2×221020110111002² (a number of 29 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 21814060283 + ... + 21814070414.

Almost surely, 2^{221020110111002} is an apocalyptic number.

221020110111002 is a deficient number, since it is larger than the sum of its proper divisors (132367748542798).

221020110111002 is a wasteful number, since it uses less digits than its factorization.

221020110111002 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43628130865.

The product of its (nonzero) digits is 16, while the sum is 14.

Adding to 221020110111002 its reverse (200111011020122), we get a palindrome (421131121131124).

The spelling of 221020110111002 in words is "two hundred twenty-one trillion, twenty billion, one hundred ten million, one hundred eleven thousand, two".