1012531230421 has 16 divisors (see below), whose sum is σ = 1083392147376. Its totient is φ = 942930395136.

The previous prime is 1012531230383. The next prime is 1012531230439. The reversal of 1012531230421 is 1240321352101.

It can be written as a sum of positive squares in 8 ways, for example, as 5850108196 + 1006681122225 = 76486^2 + 1003335^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1012531230421 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1012531236421) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7380565 + ... + 7516501.

It is an arithmetic number, because the mean of its divisors is an integer number (67712009211).

Almost surely, 2^{1012531230421} is an apocalyptic number.

It is an amenable number.

1012531230421 is a deficient number, since it is larger than the sum of its proper divisors (70860916955).

1012531230421 is a wasteful number, since it uses less digits than its factorization.

1012531230421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 140568.

The product of its (nonzero) digits is 1440, while the sum is 25.

Adding to 1012531230421 its reverse (1240321352101), we get a palindrome (2252852582522).

The spelling of 1012531230421 in words is "one trillion, twelve billion, five hundred thirty-one million, two hundred thirty thousand, four hundred twenty-one".