1212125020 has 24 divisors (see below), whose sum is σ = 2546506368. Its totient is φ = 484651200.

The previous prime is 1212125011. The next prime is 1212125021. The reversal of 1212125020 is 205212121.

It is a happy number.

It is a super-3 number, since 3×1212125020³ (a number of 28 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a junction number, because it is equal to n+sod(n) for n = 1212124985 and 1212125003.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1212125021) 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, 43765 + ... + 65875.

It is an arithmetic number, because the mean of its divisors is an integer number (106104432).

Almost surely, 2^1212125020 is an apocalyptic number.

1212125020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1212125020 is an abundant number, since it is smaller than the sum of its proper divisors (1334381348).

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

1212125020 is a wasteful number, since it uses less digits than its factorization.

1212125020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24861 (or 24859 counting only the distinct ones).

The product of its (nonzero) digits is 80, while the sum is 16.

The square root of 1212125020 is about 34815.5858775922. The cubic root of 1212125020 is about 1066.2256807751.

Adding to 1212125020 its reverse (205212121), we get a palindrome (1417337141).

The spelling of 1212125020 in words is "one billion, two hundred twelve million, one hundred twenty-five thousand, twenty".