20101020120 has 192 divisors, whose sum is σ = 67314218400. Its totient is φ = 5199759360.

The previous prime is 20101020109. The next prime is 20101020127. The reversal of 20101020120 is 2102010102.

It is a Harshad number since it is a multiple of its sum of digits (9).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20101020127) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 1596811 + ... + 1609349.

Almost surely, 2^20101020120 is an apocalyptic number.

20101020120 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20101020120, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (33657109200).

20101020120 is an abundant number, since it is smaller than the sum of its proper divisors (47213198280).

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

20101020120 is a wasteful number, since it uses less digits than its factorization.

20101020120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12690 (or 12683 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 9.

Adding to 20101020120 its reverse (2102010102), we get a palindrome (22203030222).

The spelling of 20101020120 in words is "twenty billion, one hundred one million, twenty thousand, one hundred twenty".