1012212171523 has 64 divisors (see below), whose sum is σ = 1265213440000. Its totient is φ = 790238332800.

The previous prime is 1012212171521. The next prime is 1012212171539. The reversal of 1012212171523 is 3251712122101.

It is not a de Polignac number, because 1012212171523 - 2¹ = 1012212171521 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1012212171491 and 1012212171500.

It is not an unprimeable number, because it can be changed into a prime (1012212171521) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 595768528 + ... + 595770226.

It is an arithmetic number, because the mean of its divisors is an integer number (19768960000).

Almost surely, 2^{1012212171523} is an apocalyptic number.

1012212171523 is a deficient number, since it is larger than the sum of its proper divisors (253001268477).

1012212171523 is a wasteful number, since it uses less digits than its factorization.

1012212171523 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2616.

The product of its (nonzero) digits is 1680, while the sum is 28.

Adding to 1012212171523 its reverse (3251712122101), we get a palindrome (4263924293624).

The spelling of 1012212171523 in words is "one trillion, twelve billion, two hundred twelve million, one hundred seventy-one thousand, five hundred twenty-three".