1212100000042 has 8 divisors (see below), whose sum is σ = 1860432558336. Its totient is φ = 591955813932.

The previous prime is 1212100000039. The next prime is 1212100000043. The reversal of 1212100000042 is 2400000012121.

It is a happy number.

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

It is a junction number, because it is equal to n+sod(n) for n = 1212099999968 and 1212100000031.

It is not an unprimeable number, because it can be changed into a prime (1212100000043) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7047092938 + ... + 7047093109.

It is an arithmetic number, because the mean of its divisors is an integer number (232554069792).

Almost surely, 2^{1212100000042} is an apocalyptic number.

1212100000042 is a deficient number, since it is larger than the sum of its proper divisors (648332558294).

1212100000042 is a wasteful number, since it uses less digits than its factorization.

1212100000042 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14094186092.

The product of its (nonzero) digits is 32, while the sum is 13.

Adding to 1212100000042 its reverse (2400000012121), we get a palindrome (3612100012163).

The spelling of 1212100000042 in words is "one trillion, two hundred twelve billion, one hundred million, forty-two", and thus it is an aban number.