31123101300030 has 96 divisors (see below), whose sum is σ = 81370066752000. Its totient is φ = 8253383979456.

The previous prime is 31123101300029. The next prime is 31123101300043. The reversal of 31123101300030 is 3000310132113.

It is a happy number.

31123101300030 is a `hidden beast` number, since 311 + 2 + 310 + 13 + 0 + 0 + 0 + 30 = 666.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 31123101299976 and 31123101300012.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 33190477 + ... + 34115303.

It is an arithmetic number, because the mean of its divisors is an integer number (847604862000).

Almost surely, 2^{31123101300030} is an apocalyptic number.

31123101300030 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 31123101300030, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (40685033376000).

31123101300030 is an abundant number, since it is smaller than the sum of its proper divisors (50246965451970).

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

31123101300030 is a wasteful number, since it uses less digits than its factorization.

31123101300030 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 926918 (or 926915 counting only the distinct ones).

The product of its (nonzero) digits is 162, while the sum is 18.

Adding to 31123101300030 its reverse (3000310132113), we get a palindrome (34123411432143).

The spelling of 31123101300030 in words is "thirty-one trillion, one hundred twenty-three billion, one hundred one million, three hundred thousand, thirty".