102021200120 has 64 divisors (see below), whose sum is σ = 264792084480. Its totient is φ = 34651783296.

The previous prime is 102021200111. The next prime is 102021200129. The reversal of 102021200120 is 21002120201.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (102021200111) and next prime (102021200129).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (102021200129) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1672664 + ... + 1732583.

It is an arithmetic number, because the mean of its divisors is an integer number (4137376320).

Almost surely, 2^102021200120 is an apocalyptic number.

102021200120 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

102021200120 is an abundant number, since it is smaller than the sum of its proper divisors (162770884360).

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

102021200120 is a wasteful number, since it uses less digits than its factorization.

102021200120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3405372 (or 3405368 counting only the distinct ones).

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

Adding to 102021200120 its reverse (21002120201), we get a palindrome (123023320321).

The spelling of 102021200120 in words is "one hundred two billion, twenty-one million, two hundred thousand, one hundred twenty".