2142120220 has 24 divisors (see below), whose sum is σ = 4505067504. Its totient is φ = 855588096.

The previous prime is 2142120151. The next prime is 2142120221. The reversal of 2142120220 is 220212412.

It is a junction number, because it is equal to n+sod(n) for n = 2142120194 and 2142120203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2142120221) 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, 64749 + ... + 92068.

It is an arithmetic number, because the mean of its divisors is an integer number (187711146).

Almost surely, 2^2142120220 is an apocalyptic number.

2142120220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2142120220 is an abundant number, since it is smaller than the sum of its proper divisors (2362947284).

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

2142120220 is a wasteful number, since it uses less digits than its factorization.

2142120220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 157509 (or 157507 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 16.

The square root of 2142120220 is about 46283.0446275955. The cubic root of 2142120220 is about 1289.0841846304.

Adding to 2142120220 its reverse (220212412), we get a palindrome (2362332632).

The spelling of 2142120220 in words is "two billion, one hundred forty-two million, one hundred twenty thousand, two hundred twenty".