1212111012101 has 12 divisors (see below), whose sum is σ = 1390247344416. Its totient is φ = 1054009573320.

The previous prime is 1212111012067. The next prime is 1212111012103. The reversal of 1212111012101 is 1012101112121.

It is not a de Polignac number, because 1212111012101 - 2²² = 1212106817797 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 (1212111012103) 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 in 11 ways as a sum of consecutive naturals, for example, 217767791 + ... + 217773356.

It is an arithmetic number, because the mean of its divisors is an integer number (115853945368).

Almost surely, 2^{1212111012101} is an apocalyptic number.

1212111012101 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1212111012101 is a deficient number, since it is larger than the sum of its proper divisors (178136332315).

1212111012101 is a wasteful number, since it uses less digits than its factorization.

1212111012101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 435541192 (or 435541181 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 14.

Adding to 1212111012101 its reverse (1012101112121), we get a palindrome (2224212124222).

The spelling of 1212111012101 in words is "one trillion, two hundred twelve billion, one hundred eleven million, twelve thousand, one hundred one".