1231013211001 has 16 divisors (see below), whose sum is σ = 1408409218944. Its totient is φ = 1054001931264.

The previous prime is 1231013210993. The next prime is 1231013211037. The reversal of 1231013211001 is 1001123101321.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 1231013211001 - 2³ = 1231013210993 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1231013211061) 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, 35191546 + ... + 35226508.

It is an arithmetic number, because the mean of its divisors is an integer number (88025576184).

Almost surely, 2^{1231013211001} is an apocalyptic number.

It is an amenable number.

1231013211001 is a deficient number, since it is larger than the sum of its proper divisors (177396007943).

1231013211001 is a wasteful number, since it uses less digits than its factorization.

1231013211001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40320.

The product of its (nonzero) digits is 36, while the sum is 16.

Adding to 1231013211001 its reverse (1001123101321), we get a palindrome (2232136312322).

It can be divided in two parts, 123101321 and 1001, that multiplied together give a palindrome (123224422321).

The spelling of 1231013211001 in words is "one trillion, two hundred thirty-one billion, thirteen million, two hundred eleven thousand, one".