121212032020 has 12 divisors (see below), whose sum is σ = 254545267284. Its totient is φ = 48484812800.

The previous prime is 121212032009. The next prime is 121212032063. The reversal of 121212032020 is 20230212121.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 58989722884 + 62222309136 = 242878^2 + 249444^2 .

It is a junction number, because it is equal to n+sod(n) for n = 121212031985 and 121212032003.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3030300781 + ... + 3030300820.

It is an arithmetic number, because the mean of its divisors is an integer number (21212105607).

Almost surely, 2^121212032020 is an apocalyptic number.

121212032020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

121212032020 is an abundant number, since it is smaller than the sum of its proper divisors (133333235264).

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

121212032020 is a wasteful number, since it uses less digits than its factorization.

121212032020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6060601610 (or 6060601608 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 16.

Adding to 121212032020 its reverse (20230212121), we get a palindrome (141442244141).

The spelling of 121212032020 in words is "one hundred twenty-one billion, two hundred twelve million, thirty-two thousand, twenty".