1212132132121 has 4 divisors (see below), whose sum is σ = 1229204415744. Its totient is φ = 1195059848500.

The previous prime is 1212132132097. The next prime is 1212132132143. The reversal of 1212132132121 is 1212312312121.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1212132132121 - 2⁷ = 1212132131993 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1212132132092 and 1212132132101.

It is not an unprimeable number, because it can be changed into a prime (1212132132181) 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, 8536141705 + ... + 8536141846.

It is an arithmetic number, because the mean of its divisors is an integer number (307301103936).

Almost surely, 2^{1212132132121} is an apocalyptic number.

It is an amenable number.

1212132132121 is a deficient number, since it is larger than the sum of its proper divisors (17072283623).

1212132132121 is an equidigital number, since it uses as much as digits as its factorization.

1212132132121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17072283622.

The product of its digits is 288, while the sum is 22.

Adding to 1212132132121 its reverse (1212312312121), we get a palindrome (2424444444242).

The spelling of 1212132132121 in words is "one trillion, two hundred twelve billion, one hundred thirty-two million, one hundred thirty-two thousand, one hundred twenty-one".