1212138412121 has 16 divisors (see below), whose sum is σ = 1498933123968. Its totient is φ = 954509270400.

The previous prime is 1212138412087. The next prime is 1212138412123. The reversal of 1212138412121 is 1212148312121.

It is not a de Polignac number, because 1212138412121 - 2⁶ = 1212138412057 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1212138412123) 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 15 ways as a sum of consecutive naturals, for example, 31545260 + ... + 31583661.

It is an arithmetic number, because the mean of its divisors is an integer number (93683320248).

Almost surely, 2^{1212138412121} is an apocalyptic number.

It is an amenable number.

1212138412121 is a deficient number, since it is larger than the sum of its proper divisors (286794711847).

1212138412121 is a wasteful number, since it uses less digits than its factorization.

1212138412121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 63129152.

The product of its digits is 1536, while the sum is 29.

The spelling of 1212138412121 in words is "one trillion, two hundred twelve billion, one hundred thirty-eight million, four hundred twelve thousand, one hundred twenty-one".