20101022120 has 16 divisors (see below), whose sum is σ = 45227299860. Its totient is φ = 8040408832.

The previous prime is 20101022101. The next prime is 20101022129. The reversal of 20101022120 is 2122010102.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 20006970916 + 94051204 = 141446^2 + 9698^2 .

It is not an unprimeable number, because it can be changed into a prime (20101022129) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 251262737 + ... + 251262816.

Almost surely, 2^20101022120 is an apocalyptic number.

20101022120 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20101022120 is an abundant number, since it is smaller than the sum of its proper divisors (25126277740).

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

20101022120 is a wasteful number, since it uses less digits than its factorization.

20101022120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 502525564 (or 502525560 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 11.

Adding to 20101022120 its reverse (2122010102), we get a palindrome (22223032222).

The spelling of 20101022120 in words is "twenty billion, one hundred one million, twenty-two thousand, one hundred twenty".