2101512341545 has 8 divisors (see below), whose sum is σ = 2603163674880. Its totient is φ = 1626977296560.

The previous prime is 2101512341543. The next prime is 2101512341557. The reversal of 2101512341545 is 5451432151012.

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

It is not a de Polignac number, because 2101512341545 - 2¹ = 2101512341543 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 2101512341545.

It is not an unprimeable number, because it can be changed into a prime (2101512341543) 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, 6779071915 + ... + 6779072224.

It is an arithmetic number, because the mean of its divisors is an integer number (325395459360).

Almost surely, 2^{2101512341545} is an apocalyptic number.

It is an amenable number.

2101512341545 is a deficient number, since it is larger than the sum of its proper divisors (501651333335).

2101512341545 is a wasteful number, since it uses less digits than its factorization.

2101512341545 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13558144175.

The product of its (nonzero) digits is 24000, while the sum is 34.

Adding to 2101512341545 its reverse (5451432151012), we get a palindrome (7552944492557).

The spelling of 2101512341545 in words is "two trillion, one hundred one billion, five hundred twelve million, three hundred forty-one thousand, five hundred forty-five".