2115503021541 has 32 divisors (see below), whose sum is σ = 3552329482240. Its totient is φ = 1089919260864.

The previous prime is 2115503021473. The next prime is 2115503021551. The reversal of 2115503021541 is 1451203055112.

It is not a de Polignac number, because 2115503021541 - 2¹¹ = 2115503019493 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 2115503021499 and 2115503021508.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2115503021551) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 90094021 + ... + 90117498.

It is an arithmetic number, because the mean of its divisors is an integer number (111010296320).

Almost surely, 2^{2115503021541} is an apocalyptic number.

2115503021541 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

2115503021541 is a deficient number, since it is larger than the sum of its proper divisors (1436826460699).

2115503021541 is a wasteful number, since it uses less digits than its factorization.

2115503021541 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 180211585.

The product of its (nonzero) digits is 6000, while the sum is 30.

Adding to 2115503021541 its reverse (1451203055112), we get a palindrome (3566706076653).

The spelling of 2115503021541 in words is "two trillion, one hundred fifteen billion, five hundred three million, twenty-one thousand, five hundred forty-one".