1202002120 has 32 divisors (see below), whose sum is σ = 2950369920. Its totient is φ = 437091520.

The previous prime is 1202002093. The next prime is 1202002127. The reversal of 1202002120 is 212002021.

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 = 1202002097 and 1202002106.

It is not an unprimeable number, because it can be changed into a prime (1202002127) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1365472 + ... + 1366351.

It is an arithmetic number, because the mean of its divisors is an integer number (92199060).

Almost surely, 2^1202002120 is an apocalyptic number.

1202002120 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1202002120 is an abundant number, since it is smaller than the sum of its proper divisors (1748367800).

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

1202002120 is a wasteful number, since it uses less digits than its factorization.

1202002120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2731845 (or 2731841 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 10.

The square root of 1202002120 is about 34669.9022208024. The cubic root of 1202002120 is about 1063.2492324698.

Adding to 1202002120 its reverse (212002021), we get a palindrome (1414004141).

Subtracting from 1202002120 its reverse (212002021), we obtain a palindrome (990000099).

The spelling of 1202002120 in words is "one billion, two hundred two million, two thousand, one hundred twenty".