1021212120004 has 48 divisors (see below), whose sum is σ = 1892348416000. Its totient is φ = 480864659616.

The previous prime is 1021212120001. The next prime is 1021212120083. The reversal of 1021212120004 is 4000212121201.

It is a self number, because there is not a number n which added to its sum of digits gives 1021212120004.

It is not an unprimeable number, because it can be changed into a prime (1021212120001) 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, 16954189 + ... + 17014315.

Almost surely, 2^{1021212120004} is an apocalyptic number.

It is an amenable number.

1021212120004 is a deficient number, since it is larger than the sum of its proper divisors (871136295996).

1021212120004 is a wasteful number, since it uses less digits than its factorization.

1021212120004 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 61472 (or 61470 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 16.

Adding to 1021212120004 its reverse (4000212121201), we get a palindrome (5021424241205).

The spelling of 1021212120004 in words is "one trillion, twenty-one billion, two hundred twelve million, one hundred twenty thousand, four".