1021521441803 has 16 divisors (see below), whose sum is σ = 1036465709760. Its totient is φ = 1006683088896.

The previous prime is 1021521441737. The next prime is 1021521441821. The reversal of 1021521441803 is 3081441251201.

It is a cyclic number.

It is not a de Polignac number, because 1021521441803 - 2⁸ = 1021521441547 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1021521441803.

It is not an unprimeable number, because it can be changed into a prime (1021521441883) 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, 23059451 + ... + 23103707.

It is an arithmetic number, because the mean of its divisors is an integer number (64779106860).

Almost surely, 2^{1021521441803} is an apocalyptic number.

1021521441803 is a deficient number, since it is larger than the sum of its proper divisors (14944267957).

1021521441803 is a wasteful number, since it uses less digits than its factorization.

1021521441803 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45446.

The product of its (nonzero) digits is 7680, while the sum is 32.

The spelling of 1021521441803 in words is "one trillion, twenty-one billion, five hundred twenty-one million, four hundred forty-one thousand, eight hundred three".