100121220202 has 16 divisors (see below), whose sum is σ = 151206633000. Its totient is φ = 49719084480.

The previous prime is 100121220193. The next prime is 100121220203. The reversal of 100121220202 is 202022121001.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 89298771241 + 10822448961 = 298829^2 + 104031^2 .

It is not an unprimeable number, because it can be changed into a prime (100121220203) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 4405324 + ... + 4427992.

Almost surely, 2^100121220202 is an apocalyptic number.

100121220202 is a deficient number, since it is larger than the sum of its proper divisors (51085412798).

100121220202 is a wasteful number, since it uses less digits than its factorization.

100121220202 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 37641.

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

Adding to 100121220202 its reverse (202022121001), we get a palindrome (302143341203).

The spelling of 100121220202 in words is "one hundred billion, one hundred twenty-one million, two hundred twenty thousand, two hundred two".