1021221010012 has 48 divisors (see below), whose sum is σ = 2112302223360. Its totient is φ = 422931854592.

The previous prime is 1021221010003. The next prime is 1021221010027. The reversal of 1021221010012 is 2100101221201.

It is a junction number, because it is equal to n+sod(n) for n = 1021221009974 and 1021221010001.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4807453 + ... + 5015380.

It is an arithmetic number, because the mean of its divisors is an integer number (44006296320).

Almost surely, 2^{1021221010012} is an apocalyptic number.

It is an amenable number.

1021221010012 is an abundant number, since it is smaller than the sum of its proper divisors (1091081213348).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1021221010012 is a wasteful number, since it uses less digits than its factorization.

1021221010012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9822970 (or 9822968 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 13.

Adding to 1021221010012 its reverse (2100101221201), we get a palindrome (3121322231213).

The spelling of 1021221010012 in words is "one trillion, twenty-one billion, two hundred twenty-one million, ten thousand, twelve".