1012623345521 has 4 divisors (see below), whose sum is σ = 1019329460544. Its totient is φ = 1005917230500.

The previous prime is 1012623345443. The next prime is 1012623345523. The reversal of 1012623345521 is 1255433262101.

1012623345521 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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.

It is a cyclic number.

It is not a de Polignac number, because 1012623345521 - 2²² = 1012619151217 is a prime.

It is a super-2 number, since 2×1012623345521² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1012623345523) 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, 3353057285 + ... + 3353057586.

It is an arithmetic number, because the mean of its divisors is an integer number (254832365136).

Almost surely, 2^{1012623345521} is an apocalyptic number.

It is an amenable number.

1012623345521 is a deficient number, since it is larger than the sum of its proper divisors (6706115023).

1012623345521 is an equidigital number, since it uses as much as digits as its factorization.

1012623345521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6706115022.

The product of its (nonzero) digits is 43200, while the sum is 35.

The spelling of 1012623345521 in words is "one trillion, twelve billion, six hundred twenty-three million, three hundred forty-five thousand, five hundred twenty-one".