1021011221012 has 12 divisors (see below), whose sum is σ = 1787123417856. Its totient is φ = 510404530200.

The previous prime is 1021011220981. The next prime is 1021011221023. The reversal of 1021011221012 is 2101221101201.

It is a super-2 number, since 2×1021011221012² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

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 in 3 ways as a sum of consecutive naturals, for example, 25247348 + ... + 25287755.

It is an arithmetic number, because the mean of its divisors is an integer number (148926951488).

Almost surely, 2^{1021011221012} is an apocalyptic number.

It is an amenable number.

1021011221012 is a deficient number, since it is larger than the sum of its proper divisors (766112196844).

1021011221012 is a wasteful number, since it uses less digits than its factorization.

1021011221012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 50540158 (or 50540156 counting only the distinct ones).

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

Adding to 1021011221012 its reverse (2101221101201), we get a palindrome (3122232322213).

The spelling of 1021011221012 in words is "one trillion, twenty-one billion, eleven million, two hundred twenty-one thousand, twelve".