20123111303031 has 16 divisors (see below), whose sum is σ = 29270191760640. Its totient is φ = 12195736830720.

The previous prime is 20123111303023. The next prime is 20123111303033. The reversal of 20123111303031 is 13030311132102.

It is a happy number.

It is not a de Polignac number, because 20123111303031 - 2³ = 20123111303023 is a prime.

It is a super-2 number, since 2×20123111303031² (a number of 27 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 20123111302989 and 20123111303007.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20123111303033) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2582215 + ... + 6849383.

It is an arithmetic number, because the mean of its divisors is an integer number (1829386985040).

Almost surely, 2^{20123111303031} is an apocalyptic number.

20123111303031 is a deficient number, since it is larger than the sum of its proper divisors (9147080457609).

20123111303031 is a wasteful number, since it uses less digits than its factorization.

20123111303031 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4410086.

The product of its (nonzero) digits is 324, while the sum is 21.

Adding to 20123111303031 its reverse (13030311132102), we get a palindrome (33153422435133).

The spelling of 20123111303031 in words is "twenty trillion, one hundred twenty-three billion, one hundred eleven million, three hundred three thousand, thirty-one".