1021451351155 has 16 divisors (see below), whose sum is σ = 1269358675200. Its totient is φ = 788540967648.

The previous prime is 1021451351119. The next prime is 1021451351171. The reversal of 1021451351155 is 5511531541201.

It is a cyclic number.

It is not a de Polignac number, because 1021451351155 - 2¹⁹ = 1021450826867 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1021451351155.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 28602255 + ... + 28637944.

It is an arithmetic number, because the mean of its divisors is an integer number (79334917200).

Almost surely, 2^{1021451351155} is an apocalyptic number.

1021451351155 is a deficient number, since it is larger than the sum of its proper divisors (247907324045).

1021451351155 is an equidigital number, since it uses as much as digits as its factorization.

1021451351155 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 57240330.

The product of its (nonzero) digits is 15000, while the sum is 34.

Adding to 1021451351155 its reverse (5511531541201), we get a palindrome (6532982892356).

The spelling of 1021451351155 in words is "one trillion, twenty-one billion, four hundred fifty-one million, three hundred fifty-one thousand, one hundred fifty-five".