1021656427171 has 8 divisors (see below), whose sum is σ = 1054689778688. Its totient is φ = 988627869000.

The previous prime is 1021656427139. The next prime is 1021656427193. The reversal of 1021656427171 is 1717246561201.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1021656427171 - 2⁵ = 1021656427139 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1021656427871) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 762645 + ... + 1620166.

It is an arithmetic number, because the mean of its divisors is an integer number (131836222336).

Almost surely, 2^{1021656427171} is an apocalyptic number.

1021656427171 is a deficient number, since it is larger than the sum of its proper divisors (33033351517).

1021656427171 is a wasteful number, since it uses less digits than its factorization.

1021656427171 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2396673.

The product of its (nonzero) digits is 141120, while the sum is 43.

The spelling of 1021656427171 in words is "one trillion, twenty-one billion, six hundred fifty-six million, four hundred twenty-seven thousand, one hundred seventy-one".