20011210120 has 32 divisors (see below), whose sum is σ = 49118425920. Its totient is φ = 7276803520.

The previous prime is 20011210091. The next prime is 20011210123. The reversal of 20011210120 is 2101211002.

It is a Harshad number since it is a multiple of its sum of digits (10).

It is a junction number, because it is equal to n+sod(n) for n = 20011210097 and 20011210106.

It is not an unprimeable number, because it can be changed into a prime (20011210123) 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, 22739572 + ... + 22740451.

It is an arithmetic number, because the mean of its divisors is an integer number (1534950810).

Almost surely, 2^20011210120 is an apocalyptic number.

20011210120 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20011210120 is an abundant number, since it is smaller than the sum of its proper divisors (29107215800).

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

20011210120 is a wasteful number, since it uses less digits than its factorization.

20011210120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45480045 (or 45480041 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 10.

Adding to 20011210120 its reverse (2101211002), we get a palindrome (22112421122).

It can be divided in two parts, 2001 and 1210120, that added together give a palindrome (1212121).

The spelling of 20011210120 in words is "twenty billion, eleven million, two hundred ten thousand, one hundred twenty".