121001222020 has 24 divisors (see below), whose sum is σ = 290402933184. Its totient is φ = 41486133216.

The previous prime is 121001221987. The next prime is 121001222029. The reversal of 121001222020 is 20222100121.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (121001222029) 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 7 ways as a sum of consecutive naturals, for example, 432147082 + ... + 432147361.

It is an arithmetic number, because the mean of its divisors is an integer number (12100122216).

Almost surely, 2^121001222020 is an apocalyptic number.

121001222020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

121001222020 is an abundant number, since it is smaller than the sum of its proper divisors (169401711164).

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

121001222020 is a wasteful number, since it uses less digits than its factorization.

121001222020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 864294459 (or 864294457 counting only the distinct ones).

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

Adding to 121001222020 its reverse (20222100121), we get a palindrome (141223322141).

The spelling of 121001222020 in words is "one hundred twenty-one billion, one million, two hundred twenty-two thousand, twenty".