2123201020 has 24 divisors (see below), whose sum is σ = 4466093184. Its totient is φ = 847876416.

The previous prime is 2123201011. The next prime is 2123201021. The reversal of 2123201020 is 201023212.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2123201021) 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, 75307 + ... + 99586.

It is an arithmetic number, because the mean of its divisors is an integer number (186087216).

Almost surely, 2^2123201020 is an apocalyptic number.

2123201020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2123201020 is an abundant number, since it is smaller than the sum of its proper divisors (2342892164).

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

2123201020 is a wasteful number, since it uses less digits than its factorization.

2123201020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 175509 (or 175507 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 13.

The square root of 2123201020 is about 46078.2054772102. The cubic root of 2123201020 is about 1285.2778941444.

Adding to 2123201020 its reverse (201023212), we get a palindrome (2324224232).

The spelling of 2123201020 in words is "two billion, one hundred twenty-three million, two hundred one thousand, twenty".