1212002021111 has 8 divisors (see below), whose sum is σ = 1398859476384. Its totient is φ = 1028573143200.

The previous prime is 1212002021107. The next prime is 1212002021123. The reversal of 1212002021111 is 1111202002121.

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 1212002021111 - 2² = 1212002021107 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1212002021141) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 857143580 + ... + 857144993.

It is an arithmetic number, because the mean of its divisors is an integer number (174857434548).

Almost surely, 2^{1212002021111} is an apocalyptic number.

1212002021111 is a deficient number, since it is larger than the sum of its proper divisors (186857455273).

1212002021111 is a wasteful number, since it uses less digits than its factorization.

1212002021111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1714288681.

The product of its (nonzero) digits is 16, while the sum is 14.

Adding to 1212002021111 its reverse (1111202002121), we get a palindrome (2323204023232).

The spelling of 1212002021111 in words is "one trillion, two hundred twelve billion, two million, twenty-one thousand, one hundred eleven".