1201520105615 has 16 divisors (see below), whose sum is σ = 1458428146560. Its totient is φ = 950187663360.

The previous prime is 1201520105609. The next prime is 1201520105629. The reversal of 1201520105615 is 5165010251021.

It is not a de Polignac number, because 1201520105615 - 2⁶ = 1201520105551 is a prime.

It is a congruent number.

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, 2322674 + ... + 2792463.

It is an arithmetic number, because the mean of its divisors is an integer number (91151759160).

Almost surely, 2^{1201520105615} is an apocalyptic number.

1201520105615 is a deficient number, since it is larger than the sum of its proper divisors (256908040945).

1201520105615 is a wasteful number, since it uses less digits than its factorization.

1201520105615 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5115682.

The product of its (nonzero) digits is 3000, while the sum is 29.

Adding to 1201520105615 its reverse (5165010251021), we get a palindrome (6366530356636).

The spelling of 1201520105615 in words is "one trillion, two hundred one billion, five hundred twenty million, one hundred five thousand, six hundred fifteen".