1021220000012 has 6 divisors (see below), whose sum is σ = 1787135000028. Its totient is φ = 510610000004.

The previous prime is 1021219999993. The next prime is 1021220000111. The reversal of 1021220000012 is 2100000221201.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 1021219999948 and 1021220000002.

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, 127652499998 + ... + 127652500005.

It is an arithmetic number, because the mean of its divisors is an integer number (297855833338).

Almost surely, 2^{1021220000012} is an apocalyptic number.

It is an amenable number.

1021220000012 is a deficient number, since it is larger than the sum of its proper divisors (765915000016).

1021220000012 is a wasteful number, since it uses less digits than its factorization.

1021220000012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 255305000007 (or 255305000005 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 11.

Adding to 1021220000012 its reverse (2100000221201), we get a palindrome (3121220221213).

The spelling of 1021220000012 in words is "one trillion, twenty-one billion, two hundred twenty million, twelve", and thus it is an aban number.