102661525041521 has 16 divisors (see below), whose sum is σ = 107906753289984. Its totient is φ = 97547128447104.

The previous prime is 102661525041497. The next prime is 102661525041541. The reversal of 102661525041521 is 125140525166201.

It is a cyclic number.

It is not a de Polignac number, because 102661525041521 - 2⁶ = 102661525041457 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (102661525041541) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (31) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3683021 + ... + 14794853.

It is an arithmetic number, because the mean of its divisors is an integer number (6744172080624).

Almost surely, 2^{102661525041521} is an apocalyptic number.

It is an amenable number.

102661525041521 is a deficient number, since it is larger than the sum of its proper divisors (5245228248463).

102661525041521 is a wasteful number, since it uses less digits than its factorization.

102661525041521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11117720.

The product of its (nonzero) digits is 144000, while the sum is 41.

The spelling of 102661525041521 in words is "one hundred two trillion, six hundred sixty-one billion, five hundred twenty-five million, forty-one thousand, five hundred twenty-one".