1231020030031 has 24 divisors (see below), whose sum is σ = 1440424312704. Its totient is φ = 1043052881280.

The previous prime is 1231020030011. The next prime is 1231020030047. The reversal of 1231020030031 is 1300300201321.

It is not a de Polignac number, because 1231020030031 - 2¹³ = 1231020021839 is a prime.

It is a super-3 number, since 3×1231020030031³ (a number of 37 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1231020029987 and 1231020030014.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1231020030011) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1552345 + ... + 2207218.

It is an arithmetic number, because the mean of its divisors is an integer number (60017679696).

Almost surely, 2^{1231020030031} is an apocalyptic number.

1231020030031 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

1231020030031 is a deficient number, since it is larger than the sum of its proper divisors (209404282673).

1231020030031 is a wasteful number, since it uses less digits than its factorization.

1231020030031 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3759711 (or 3759694 counting only the distinct ones).

The product of its (nonzero) digits is 108, while the sum is 16.

Adding to 1231020030031 its reverse (1300300201321), we get a palindrome (2531320231352).

The spelling of 1231020030031 in words is "one trillion, two hundred thirty-one billion, twenty million, thirty thousand, thirty-one".