1121212112101 has 8 divisors (see below), whose sum is σ = 1188983795544. Its totient is φ = 1053642432000.

The previous prime is 1121212112023. The next prime is 1121212112147. The reversal of 1121212112101 is 1012112121211.

It can be written as a sum of positive squares in 4 ways, for example, as 264606331201 + 856605780900 = 514399^2 + 925530^2 .

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 1121212112101 - 2¹³ = 1121212103909 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 (1121212142101) 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, 50489400 + ... + 50511601.

It is an arithmetic number, because the mean of its divisors is an integer number (148622974443).

Almost surely, 2^{1121212112101} is an apocalyptic number.

It is an amenable number.

1121212112101 is a deficient number, since it is larger than the sum of its proper divisors (67771683443).

1121212112101 is a wasteful number, since it uses less digits than its factorization.

1121212112101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 101001671.

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

Adding to 1121212112101 its reverse (1012112121211), we get a palindrome (2133324233312).

It can be divided in two parts, 112121 and 2112101, that added together give a palindrome (2224222).

The spelling of 1121212112101 in words is "one trillion, one hundred twenty-one billion, two hundred twelve million, one hundred twelve thousand, one hundred one".