1212020210120 has 32 divisors (see below), whose sum is σ = 2727141489720. Its totient is φ = 484791014400.

The previous prime is 1212020210111. The next prime is 1212020210129. The reversal of 1212020210120 is 210120202121.

It is an interprime number because it is at equal distance from previous prime (1212020210111) and next prime (1212020210129).

It can be written as a sum of positive squares in 4 ways, for example, as 1153042144804 + 58978065316 = 1073798^2 + 242854^2 .

It is a junction number, because it is equal to n+sod(n) for n = 1212020210095 and 1212020210104.

It is not an unprimeable number, because it can be changed into a prime (1212020210129) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 649214 + ... + 1686866.

Almost surely, 2^{1212020210120} is an apocalyptic number.

1212020210120 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1212020210120 is an abundant number, since it is smaller than the sum of its proper divisors (1515121279600).

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

1212020210120 is a wasteful number, since it uses less digits than its factorization.

1212020210120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1066865 (or 1066861 counting only the distinct ones).

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

Adding to 1212020210120 its reverse (210120202121), we get a palindrome (1422140412241).

It can be divided in two parts, 12120202101 and 20, that added together give a palindrome (12120202121).

The spelling of 1212020210120 in words is "one trillion, two hundred twelve billion, twenty million, two hundred ten thousand, one hundred twenty".