31121123001031 has 8 divisors (see below), whose sum is σ = 35745726348800. Its totient is φ = 26541201811608.

The previous prime is 31121123001013. The next prime is 31121123001037. The reversal of 31121123001031 is 13010032112113.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 31121123001031 - 2⁵ = 31121123000999 is a prime.

It is a super-2 number, since 2×31121123001031² (a number of 28 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31121123001037) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11170538091 + ... + 11170540876.

It is an arithmetic number, because the mean of its divisors is an integer number (4468215793600).

Almost surely, 2^{31121123001031} is an apocalyptic number.

31121123001031 is a deficient number, since it is larger than the sum of its proper divisors (4624603347769).

31121123001031 is a wasteful number, since it uses less digits than its factorization.

31121123001031 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22341079173.

The product of its (nonzero) digits is 108, while the sum is 19.

Adding to 31121123001031 its reverse (13010032112113), we get a palindrome (44131155113144).

The spelling of 31121123001031 in words is "thirty-one trillion, one hundred twenty-one billion, one hundred twenty-three million, one thousand, thirty-one".