1021613476821 has 64 divisors (see below), whose sum is σ = 1687751424000. Its totient is φ = 547884062208.

The previous prime is 1021613476811. The next prime is 1021613476853. The reversal of 1021613476821 is 1286743161201.

It is not a de Polignac number, because 1021613476821 - 2⁵ = 1021613476789 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1021613476811) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 1847781 + ... + 2336133.

It is an arithmetic number, because the mean of its divisors is an integer number (26371116000).

Almost surely, 2^{1021613476821} is an apocalyptic number.

It is an amenable number.

1021613476821 is a deficient number, since it is larger than the sum of its proper divisors (666137947179).

1021613476821 is a wasteful number, since it uses less digits than its factorization.

1021613476821 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 488503 (or 488489 counting only the distinct ones).

The product of its (nonzero) digits is 96768, while the sum is 42.

The spelling of 1021613476821 in words is "one trillion, twenty-one billion, six hundred thirteen million, four hundred seventy-six thousand, eight hundred twenty-one".