20010123012 has 24 divisors (see below), whose sum is σ = 50934858912. Its totient is φ = 6063673600.

The previous prime is 20010122933. The next prime is 20010123031. The reversal of 20010123012 is 21032101002.

It is a Harshad number since it is a multiple of its sum of digits (12).

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 75795789 + ... + 75796052.

It is an arithmetic number, because the mean of its divisors is an integer number (2122285788).

Almost surely, 2^20010123012 is an apocalyptic number.

20010123012 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

20010123012 is an abundant number, since it is smaller than the sum of its proper divisors (30924735900).

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

20010123012 is a wasteful number, since it uses less digits than its factorization.

20010123012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 151591859 (or 151591857 counting only the distinct ones).

The product of its (nonzero) digits is 24, while the sum is 12.

Adding to 20010123012 its reverse (21032101002), we get a palindrome (41042224014).

The spelling of 20010123012 in words is "twenty billion, ten million, one hundred twenty-three thousand, twelve".