1011201112121 has 4 divisors (see below), whose sum is σ = 1013016554532. Its totient is φ = 1009385669712.

The previous prime is 1011201112091. The next prime is 1011201112133. The reversal of 1011201112121 is 1212111021101.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 39596622121 + 971604490000 = 198989^2 + 985700^2 .

It is a cyclic number.

It is not a de Polignac number, because 1011201112121 - 2⁶ = 1011201112057 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1011201112096 and 1011201112105.

It is not an unprimeable number, because it can be changed into a prime (1011201111121) 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 3 ways as a sum of consecutive naturals, for example, 907720370 + ... + 907721483.

It is an arithmetic number, because the mean of its divisors is an integer number (253254138633).

Almost surely, 2^{1011201112121} is an apocalyptic number.

It is an amenable number.

1011201112121 is a deficient number, since it is larger than the sum of its proper divisors (1815442411).

1011201112121 is an equidigital number, since it uses as much as digits as its factorization.

1011201112121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1815442410.

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

Adding to 1011201112121 its reverse (1212111021101), we get a palindrome (2223312133222).

The spelling of 1011201112121 in words is "one trillion, eleven billion, two hundred one million, one hundred twelve thousand, one hundred twenty-one".