1212001121 has 2 divisors, whose sum is σ = 1212001122. Its totient is φ = 1212001120.

The previous prime is 1212001039. The next prime is 1212001157. The reversal of 1212001121 is 1211002121.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1060218721 + 151782400 = 32561^2 + 12320^2 .

It is a cyclic number.

It is not a de Polignac number, because 1212001121 - 2¹⁴ = 1211984737 is a prime.

It is not a weakly prime, because it can be changed into another prime (1212001171) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 606000560 + 606000561.

It is an arithmetic number, because the mean of its divisors is an integer number (606000561).

Almost surely, 2^1212001121 is an apocalyptic number.

It is an amenable number.

1212001121 is a deficient number, since it is larger than the sum of its proper divisors (1).

1212001121 is an equidigital number, since it uses as much as digits as its factorization.

1212001121 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 8, while the sum is 11.

The square root of 1212001121 is about 34813.8064709965. The cubic root of 1212001121 is about 1066.1893509701.

Adding to 1212001121 its reverse (1211002121), we get a palindrome (2423003242).

The spelling of 1212001121 in words is "one billion, two hundred twelve million, one thousand, one hundred twenty-one".