1355305461021 has 12 divisors (see below), whose sum is σ = 1969385981472. Its totient is φ = 898126571976.

The previous prime is 1355305461017. The next prime is 1355305461071. The reversal of 1355305461021 is 1201645035531.

1355305461021 is a `hidden beast` number, since 1 + 3 + 5 + 5 + 3 + 0 + 546 + 102 + 1 = 666.

It is not a de Polignac number, because 1355305461021 - 2² = 1355305461017 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1355305461071) 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, 450865251 + ... + 450868256.

It is an arithmetic number, because the mean of its divisors is an integer number (164115498456).

Almost surely, 2^{1355305461021} is an apocalyptic number.

It is an amenable number.

1355305461021 is a deficient number, since it is larger than the sum of its proper divisors (614080520451).

1355305461021 is a wasteful number, since it uses less digits than its factorization.

1355305461021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 901733680 (or 901733677 counting only the distinct ones).

The product of its (nonzero) digits is 54000, while the sum is 36.

The spelling of 1355305461021 in words is "one trillion, three hundred fifty-five billion, three hundred five million, four hundred sixty-one thousand, twenty-one".