1212001111101 has 32 divisors (see below), whose sum is σ = 1818245615616. Its totient is φ = 711799400000.

The previous prime is 1212001111043. The next prime is 1212001111133. The reversal of 1212001111101 is 1011111002121.

It is a cyclic number.

It is not a de Polignac number, because 1212001111101 - 2¹⁸ = 1212000848957 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1212001111171) 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 31 ways as a sum of consecutive naturals, for example, 3711825 + ... + 4025126.

It is an arithmetic number, because the mean of its divisors is an integer number (56820175488).

Almost surely, 2^{1212001111101} is an apocalyptic number.

1212001111101 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1212001111101 is a deficient number, since it is larger than the sum of its proper divisors (606244504515).

1212001111101 is a wasteful number, since it uses less digits than its factorization.

1212001111101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7737113.

The product of its (nonzero) digits is 4, while the sum is 12.

Adding to 1212001111101 its reverse (1011111002121), we get a palindrome (2223112113222).

The spelling of 1212001111101 in words is "one trillion, two hundred twelve billion, one million, one hundred eleven thousand, one hundred one".