1021152545145 has 20 divisors (see below), whose sum is σ = 1830510489060. Its totient is φ = 544614690528.

The previous prime is 1021152545137. The next prime is 1021152545177. The reversal of 1021152545145 is 5415452511201.

1021152545145 is a `hidden beast` number, since 1 + 0 + 2 + 115 + 25 + 4 + 514 + 5 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 476402267961 + 544750277184 = 690219^2 + 738072^2 .

It is not a de Polignac number, because 1021152545145 - 2³ = 1021152545137 is a prime.

It is a super-2 number, since 2×1021152545145² (a number of 25 digits) contains 22 as substring.

It is an unprimeable number.

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 19 ways as a sum of consecutive naturals, for example, 1260681750 + ... + 1260682559.

It is an arithmetic number, because the mean of its divisors is an integer number (91525524453).

Almost surely, 2^{1021152545145} is an apocalyptic number.

1021152545145 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1021152545145 is a deficient number, since it is larger than the sum of its proper divisors (809357943915).

1021152545145 is an equidigital number, since it uses as much as digits as its factorization.

1021152545145 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2521364326 (or 2521364317 counting only the distinct ones).

The product of its (nonzero) digits is 40000, while the sum is 36.

The spelling of 1021152545145 in words is "one trillion, twenty-one billion, one hundred fifty-two million, five hundred forty-five thousand, one hundred forty-five".