100121202020 has 48 divisors (see below), whose sum is σ = 250738322688. Its totient is φ = 32834778240.

The previous prime is 100121201987. The next prime is 100121202037. The reversal of 100121202020 is 20202121001.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 100121201992 and 100121202010.

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 15 ways as a sum of consecutive naturals, for example, 15543551 + ... + 15549990.

It is an arithmetic number, because the mean of its divisors is an integer number (5223715056).

Almost surely, 2^100121202020 is an apocalyptic number.

100121202020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

100121202020 is an abundant number, since it is smaller than the sum of its proper divisors (150617120668).

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

100121202020 is a wasteful number, since it uses less digits than its factorization.

100121202020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31093580 (or 31093578 counting only the distinct ones).

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

Adding to 100121202020 its reverse (20202121001), we get a palindrome (120323323021).

The spelling of 100121202020 in words is "one hundred billion, one hundred twenty-one million, two hundred two thousand, twenty".