10261227521 has 4 divisors (see below), whose sum is σ = 10707367872. Its totient is φ = 9815087172.

The previous prime is 10261227517. The next prime is 10261227583. The reversal of 10261227521 is 12572216201.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 12572216201 = 42859 ⋅293339.

It is a cyclic number.

It is not a de Polignac number, because 10261227521 - 2² = 10261227517 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (10261217521) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 223070141 + ... + 223070186.

It is an arithmetic number, because the mean of its divisors is an integer number (2676841968).

Almost surely, 2^10261227521 is an apocalyptic number.

It is an amenable number.

10261227521 is a deficient number, since it is larger than the sum of its proper divisors (446140351).

10261227521 is an equidigital number, since it uses as much as digits as its factorization.

10261227521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 446140350.

The product of its (nonzero) digits is 3360, while the sum is 29.

The spelling of 10261227521 in words is "ten billion, two hundred sixty-one million, two hundred twenty-seven thousand, five hundred twenty-one".