1212020011 has 2 divisors, whose sum is σ = 1212020012. Its totient is φ = 1212020010.

The previous prime is 1212020009. The next prime is 1212020027. The reversal of 1212020011 is 1100202121.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1212020011 - 2¹ = 1212020009 is a prime.

Together with 1212020009, it forms a pair of twin primes.

It is a self number, because there is not a number n which added to its sum of digits gives 1212020011.

It is not a weakly prime, because it can be changed into another prime (1212020071) 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 as a sum of consecutive naturals, namely, 606010005 + 606010006.

It is an arithmetic number, because the mean of its divisors is an integer number (606010006).

Almost surely, 2^1212020011 is an apocalyptic number.

1212020011 is a deficient number, since it is larger than the sum of its proper divisors (1).

1212020011 is an equidigital number, since it uses as much as digits as its factorization.

1212020011 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 10.

The square root of 1212020011 is about 34814.0777703503. The cubic root of 1212020011 is about 1066.1948900772.

Adding to 1212020011 its reverse (1100202121), we get a palindrome (2312222132).

It can be divided in two parts, 12120 and 20011, that added together give a triangular number (32131 = T₂₅₃).

The spelling of 1212020011 in words is "one billion, two hundred twelve million, twenty thousand, eleven".