221001111100012 has 48 divisors (see below), whose sum is σ = 393534719978400. Its totient is φ = 108564805647360.

The previous prime is 221001111099983. The next prime is 221001111100013. The reversal of 221001111100012 is 210001111100122.

It is a happy number.

It is a super-2 number, since 2×221001111100012² (a number of 29 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 221001111099965 and 221001111100001.

It is not an unprimeable number, because it can be changed into a prime (221001111100013) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3199495108 + ... + 3199564180.

It is an arithmetic number, because the mean of its divisors is an integer number (8198639999550).

Almost surely, 2^{221001111100012} is an apocalyptic number.

It is an amenable number.

221001111100012 is a deficient number, since it is larger than the sum of its proper divisors (172533608878388).

221001111100012 is a wasteful number, since it uses less digits than its factorization.

221001111100012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 76786 (or 76784 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 13.

Adding to 221001111100012 its reverse (210001111100122), we get a palindrome (431002222200134).

The spelling of 221001111100012 in words is "two hundred twenty-one trillion, one billion, one hundred eleven million, one hundred thousand, twelve".