121212211200020 has 12 divisors (see below), whose sum is σ = 254545643520084. Its totient is φ = 48484884480000.

The previous prime is 121212211200007. The next prime is 121212211200053. The reversal of 121212211200020 is 20002112212121.

It can be written as a sum of positive squares in 2 ways, for example, as 15942723351556 + 105269487848464 = 3992834^2 + 10260092^2 .

It is a super-3 number, since 3×121212211200020³ (a number of 43 digits) contains 333 as substring.

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, 3030305279981 + ... + 3030305280020.

It is an arithmetic number, because the mean of its divisors is an integer number (21212136960007).

Almost surely, 2^{121212211200020} is an apocalyptic number.

121212211200020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

121212211200020 is an abundant number, since it is smaller than the sum of its proper divisors (133333432320064).

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

121212211200020 is a wasteful number, since it uses less digits than its factorization.

121212211200020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6060610560010 (or 6060610560008 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 17.

Adding to 121212211200020 its reverse (20002112212121), we get a palindrome (141214323412141).

The spelling of 121212211200020 in words is "one hundred twenty-one trillion, two hundred twelve billion, two hundred eleven million, two hundred thousand, twenty".