121002210020 has 96 divisors (see below), whose sum is σ = 271641517056. Its totient is φ = 45117388800.

The previous prime is 121002210013. The next prime is 121002210023. The reversal of 121002210020 is 20012200121.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 121002209983 and 121002210010.

It is not an unprimeable number, because it can be changed into a prime (121002210023) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 15936425 + ... + 15944015.

It is an arithmetic number, because the mean of its divisors is an integer number (2829599136).

Almost surely, 2^121002210020 is an apocalyptic number.

121002210020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 121002210020, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (135820758528).

121002210020 is an abundant number, since it is smaller than the sum of its proper divisors (150639307036).

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

121002210020 is a wasteful number, since it uses less digits than its factorization.

121002210020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8061 (or 8059 counting only the distinct ones).

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

Adding to 121002210020 its reverse (20012200121), we get a palindrome (141014410141).

The spelling of 121002210020 in words is "one hundred twenty-one billion, two million, two hundred ten thousand, twenty".