115015123103221 has 16 divisors (see below), whose sum is σ = 131729535060480. Its totient is φ = 99399572878320.

The previous prime is 115015123103207. The next prime is 115015123103239. The reversal of 115015123103221 is 122301321510511.

It is a happy number.

It is not a de Polignac number, because 115015123103221 - 2¹⁵ = 115015123070453 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 115015123103221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (115015123103291) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1394453331 + ... + 1394535808.

It is an arithmetic number, because the mean of its divisors is an integer number (8233095941280).

Almost surely, 2^{115015123103221} is an apocalyptic number.

115015123103221 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

115015123103221 is a deficient number, since it is larger than the sum of its proper divisors (16714411957259).

115015123103221 is a wasteful number, since it uses less digits than its factorization.

115015123103221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2788989336.

The product of its (nonzero) digits is 1800, while the sum is 28.

Adding to 115015123103221 its reverse (122301321510511), we get a palindrome (237316444613732).

The spelling of 115015123103221 in words is "one hundred fifteen trillion, fifteen billion, one hundred twenty-three million, one hundred three thousand, two hundred twenty-one".