121212201020 has 48 divisors (see below), whose sum is σ = 255390014880. Its totient is φ = 48324182016.

The previous prime is 121212200983. The next prime is 121212201079. The reversal of 121212201020 is 20102212121.

It is a super-2 number, since 2×121212201020² (a number of 23 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 121212200986 and 121212201004.

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 15 ways as a sum of consecutive naturals, for example, 28259036 + ... + 28263324.

It is an arithmetic number, because the mean of its divisors is an integer number (5320625310).

Almost surely, 2^121212201020 is an apocalyptic number.

121212201020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

121212201020 is an abundant number, since it is smaller than the sum of its proper divisors (134177813860).

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

121212201020 is a wasteful number, since it uses less digits than its factorization.

121212201020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8654 (or 8652 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 14.

Adding to 121212201020 its reverse (20102212121), we get a palindrome (141314413141).

The spelling of 121212201020 in words is "one hundred twenty-one billion, two hundred twelve million, two hundred one thousand, twenty".