31101405126 has 64 divisors (see below), whose sum is σ = 68620608000. Its totient is φ = 9396821280.

The previous prime is 31101405103. The next prime is 31101405131. The reversal of 31101405126 is 62150410113.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 31101405096 and 31101405105.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2781535 + ... + 2792693.

It is an arithmetic number, because the mean of its divisors is an integer number (1072197000).

Almost surely, 2^31101405126 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 31101405126, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (34310304000).

31101405126 is an abundant number, since it is smaller than the sum of its proper divisors (37519202874).

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

31101405126 is a wasteful number, since it uses less digits than its factorization.

31101405126 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11546 (or 11524 counting only the distinct ones).

The product of its (nonzero) digits is 720, while the sum is 24.

Adding to 31101405126 its reverse (62150410113), we get a palindrome (93251815239).

The spelling of 31101405126 in words is "thirty-one billion, one hundred one million, four hundred five thousand, one hundred twenty-six".