2158353588021 has 24 divisors (see below), whose sum is σ = 2993325319872. Its totient is φ = 1383264144000.

The previous prime is 2158353587987. The next prime is 2158353588047. The reversal of 2158353588021 is 1208853538512.

It is not a de Polignac number, because 2158353588021 - 2¹⁹ = 2158353063733 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 (2158353588091) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2043636 + ... + 2914301.

It is an arithmetic number, because the mean of its divisors is an integer number (124721888328).

Almost surely, 2^{2158353588021} is an apocalyptic number.

It is an amenable number.

2158353588021 is a deficient number, since it is larger than the sum of its proper divisors (834971731851).

2158353588021 is a wasteful number, since it uses less digits than its factorization.

2158353588021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4958153 (or 4958122 counting only the distinct ones).

The product of its (nonzero) digits is 2304000, while the sum is 51.

The spelling of 2158353588021 in words is "two trillion, one hundred fifty-eight billion, three hundred fifty-three million, five hundred eighty-eight thousand, twenty-one".