1212020020111 has 8 divisors (see below), whose sum is σ = 1212880846464. Its totient is φ = 1211159308320.

The previous prime is 1212020020091. The next prime is 1212020020147. The reversal of 1212020020111 is 1110200202121.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1212020020111 - 2¹⁷ = 1212019889039 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1212020020091 and 1212020020100.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1212020020181) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 41136261 + ... + 41165713.

It is an arithmetic number, because the mean of its divisors is an integer number (151610105808).

Almost surely, 2^{1212020020111} is an apocalyptic number.

1212020020111 is a deficient number, since it is larger than the sum of its proper divisors (860826353).

1212020020111 is a wasteful number, since it uses less digits than its factorization.

1212020020111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 57281.

The product of its (nonzero) digits is 16, while the sum is 13.

Adding to 1212020020111 its reverse (1110200202121), we get a palindrome (2322220222232).

The spelling of 1212020020111 in words is "one trillion, two hundred twelve billion, twenty million, twenty thousand, one hundred eleven".