1021131540145 has 8 divisors (see below), whose sum is σ = 1297437721704. Its totient is φ = 768851983104.

The previous prime is 1021131540053. The next prime is 1021131540259. The reversal of 1021131540145 is 5410451311201.

It is a happy number.

1021131540145 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 19608961024 + 1001522579121 = 140032^2 + 1000761^2 .

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 1021131540145 - 2⁹ = 1021131539633 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6006656034 + ... + 6006656203.

It is an arithmetic number, because the mean of its divisors is an integer number (162179715213).

Almost surely, 2^{1021131540145} is an apocalyptic number.

It is an amenable number.

1021131540145 is a deficient number, since it is larger than the sum of its proper divisors (276306181559).

1021131540145 is a wasteful number, since it uses less digits than its factorization.

1021131540145 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12013312259.

The product of its (nonzero) digits is 2400, while the sum is 28.

Adding to 1021131540145 its reverse (5410451311201), we get a palindrome (6431582851346).

The spelling of 1021131540145 in words is "one trillion, twenty-one billion, one hundred thirty-one million, five hundred forty thousand, one hundred forty-five".