1212125072538 has 8 divisors (see below), whose sum is σ = 2424250145088. Its totient is φ = 404041690844.

The previous prime is 1212125072537. The next prime is 1212125072621. The reversal of 1212125072538 is 8352705212121.

It is a sphenic number, since it is the product of 3 distinct primes.

1212125072538 is an admirable number.

It is a super-2 number, since 2×1212125072538² (a number of 25 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1212125072496 and 1212125072505.

It is not an unprimeable number, because it can be changed into a prime (1212125072533) 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 3 ways as a sum of consecutive naturals, for example, 101010422706 + ... + 101010422717.

It is an arithmetic number, because the mean of its divisors is an integer number (303031268136).

Almost surely, 2^{1212125072538} is an apocalyptic number.

1212125072538 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

1212125072538 is a wasteful number, since it uses less digits than its factorization.

1212125072538 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 202020845428.

The product of its (nonzero) digits is 67200, while the sum is 39.

The spelling of 1212125072538 in words is "one trillion, two hundred twelve billion, one hundred twenty-five million, seventy-two thousand, five hundred thirty-eight".