31103023021230 has 128 divisors (see below), whose sum is σ = 76084143696000. Its totient is φ = 8135762632704.

The previous prime is 31103023021223. The next prime is 31103023021237. The reversal of 31103023021230 is 3212032030113.

It is an interprime number because it is at equal distance from previous prime (31103023021223) and next prime (31103023021237).

It is a junction number, because it is equal to n+sod(n) for n = 31103023021197 and 31103023021206.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31103023021237) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 1203245346 + ... + 1203271194.

It is an arithmetic number, because the mean of its divisors is an integer number (594407372625).

Almost surely, 2^{31103023021230} is an apocalyptic number.

31103023021230 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 31103023021230, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (38042071848000).

31103023021230 is an abundant number, since it is smaller than the sum of its proper divisors (44981120674770).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

31103023021230 is a wasteful number, since it uses less digits than its factorization.

31103023021230 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28918.

The product of its (nonzero) digits is 648, while the sum is 21.

Adding to 31103023021230 its reverse (3212032030113), we get a palindrome (34315055051343).

The spelling of 31103023021230 in words is "thirty-one trillion, one hundred three billion, twenty-three million, twenty-one thousand, two hundred thirty".