20401031210123 has 16 divisors (see below), whose sum is σ = 21627462244320. Its totient is φ = 19177532774400.

The previous prime is 20401031210113. The next prime is 20401031210137. The reversal of 20401031210123 is 32101213010402.

It is not a de Polignac number, because 20401031210123 - 2⁴ = 20401031210107 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20401031210095 and 20401031210104.

It is not an unprimeable number, because it can be changed into a prime (20401031210113) 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, 389596463 + ... + 389648823.

It is an arithmetic number, because the mean of its divisors is an integer number (1351716390270).

Almost surely, 2^{20401031210123} is an apocalyptic number.

20401031210123 is a deficient number, since it is larger than the sum of its proper divisors (1226431034197).

20401031210123 is a wasteful number, since it uses less digits than its factorization.

20401031210123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 79918.

The product of its (nonzero) digits is 288, while the sum is 20.

Adding to 20401031210123 its reverse (32101213010402), we get a palindrome (52502244220525).

The spelling of 20401031210123 in words is "twenty trillion, four hundred one billion, thirty-one million, two hundred ten thousand, one hundred twenty-three".