1021111100012 has 6 divisors (see below), whose sum is σ = 1786944425028. Its totient is φ = 510555550004.

The previous prime is 1021111099979. The next prime is 1021111100027. The reversal of 1021111100012 is 2100011111201.

It is a junction number, because it is equal to n+sod(n) for n = 1021111099966 and 1021111100002.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 127638887498 + ... + 127638887505.

It is an arithmetic number, because the mean of its divisors is an integer number (297824070838).

Almost surely, 2^{1021111100012} is an apocalyptic number.

It is an amenable number.

1021111100012 is a deficient number, since it is larger than the sum of its proper divisors (765833325016).

1021111100012 is a wasteful number, since it uses less digits than its factorization.

1021111100012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 255277775007 (or 255277775005 counting only the distinct ones).

The product of its (nonzero) digits is 4, while the sum is 11.

Adding to 1021111100012 its reverse (2100011111201), we get a palindrome (3121122211213).

The spelling of 1021111100012 in words is "one trillion, twenty-one billion, one hundred eleven million, one hundred thousand, twelve".