1021251351641 has 8 divisors (see below), whose sum is σ = 1080940660800. Its totient is φ = 962155966320.

The previous prime is 1021251351611. The next prime is 1021251351643. The reversal of 1021251351641 is 1461531521201.

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 1021251351641 - 2³⁸ = 746373444697 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1021251351598 and 1021251351607.

It is not an unprimeable number, because it can be changed into a prime (1021251351643) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 148477421 + ... + 148484298.

It is an arithmetic number, because the mean of its divisors is an integer number (135117582600).

Almost surely, 2^{1021251351641} is an apocalyptic number.

It is an amenable number.

1021251351641 is a deficient number, since it is larger than the sum of its proper divisors (59689309159).

1021251351641 is a wasteful number, since it uses less digits than its factorization.

1021251351641 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 296961919.

The product of its (nonzero) digits is 7200, while the sum is 32.

Adding to 1021251351641 its reverse (1461531521201), we get a palindrome (2482782872842).

The spelling of 1021251351641 in words is "one trillion, twenty-one billion, two hundred fifty-one million, three hundred fifty-one thousand, six hundred forty-one".