1020641546421 has 12 divisors (see below), whose sum is σ = 1684868584672. Its totient is φ = 583223740776.

The previous prime is 1020641546411. The next prime is 1020641546437. The reversal of 1020641546421 is 1246451460201.

1020641546421 is a `hidden beast` number, since 1 + 0 + 2 + 0 + 6 + 4 + 1 + 5 + 4 + 642 + 1 = 666.

It is not a de Polignac number, because 1020641546421 - 2¹⁵ = 1020641513653 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1020641546411) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 8100329671 + ... + 8100329796.

Almost surely, 2^{1020641546421} is an apocalyptic number.

It is an amenable number.

1020641546421 is a deficient number, since it is larger than the sum of its proper divisors (664227038251).

1020641546421 is a wasteful number, since it uses less digits than its factorization.

1020641546421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16200659480 (or 16200659477 counting only the distinct ones).

The product of its (nonzero) digits is 46080, while the sum is 36.

The spelling of 1020641546421 in words is "one trillion, twenty billion, six hundred forty-one million, five hundred forty-six thousand, four hundred twenty-one".