120021222100 has 36 divisors (see below), whose sum is σ = 280480366684. Its totient is φ = 44315527680.

The previous prime is 120021222091. The next prime is 120021222149. The reversal of 120021222100 is 1222120021.

It is a happy number.

It can be written as a sum of positive squares in 6 ways, for example, as 4213048464 + 115808173636 = 64908^2 + 340306^2 .

It is a Harshad number since it is a multiple of its sum of digits (13).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 46160709 + ... + 46163308.

Almost surely, 2^120021222100 is an apocalyptic number.

120021222100 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

120021222100 is an abundant number, since it is smaller than the sum of its proper divisors (160459144584).

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

120021222100 is a wasteful number, since it uses less digits than its factorization.

120021222100 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 92324044 (or 92324037 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 13.

Adding to 120021222100 its reverse (1222120021), we get a palindrome (121243342121).

The spelling of 120021222100 in words is "one hundred twenty billion, twenty-one million, two hundred twenty-two thousand, one hundred".