1212120201121 has 4 divisors (see below), whose sum is σ = 1275916001200. Its totient is φ = 1148324401044.

The previous prime is 1212120201101. The next prime is 1212120201157. The reversal of 1212120201121 is 1211020212121.

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 a de Polignac number, because none of the positive numbers 2^k-1212120201121 is a prime.

It is a super-2 number, since 2×1212120201121² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1212120201095 and 1212120201104.

It is not an unprimeable number, because it can be changed into a prime (1212120201101) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 31897900011 + ... + 31897900048.

It is an arithmetic number, because the mean of its divisors is an integer number (318979000300).

Almost surely, 2^{1212120201121} is an apocalyptic number.

It is an amenable number.

1212120201121 is a deficient number, since it is larger than the sum of its proper divisors (63795800079).

1212120201121 is an equidigital number, since it uses as much as digits as its factorization.

1212120201121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 63795800078.

The product of its (nonzero) digits is 32, while the sum is 16.

Adding to 1212120201121 its reverse (1211020212121), we get a palindrome (2423140413242).

The spelling of 1212120201121 in words is "one trillion, two hundred twelve billion, one hundred twenty million, two hundred one thousand, one hundred twenty-one".