11121210121001 has 4 divisors (see below), whose sum is σ = 11121217842372. Its totient is φ = 11121202399632.

The previous prime is 11121210120983. The next prime is 11121210121081. The reversal of 11121210121001 is 10012101212111.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 8210654699776 + 2910555421225 = 2865424^2 + 1706035^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-11121210121001 is a prime.

It is a super-2 number, since 2×11121210121001² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11121210121081) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 987410 + ... + 4818443.

It is an arithmetic number, because the mean of its divisors is an integer number (2780304460593).

Almost surely, 2^{11121210121001} is an apocalyptic number.

It is an amenable number.

11121210121001 is a deficient number, since it is larger than the sum of its proper divisors (7721371).

11121210121001 is an equidigital number, since it uses as much as digits as its factorization.

11121210121001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7721370.

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

Adding to 11121210121001 its reverse (10012101212111), we get a palindrome (21133311333112).

The spelling of 11121210121001 in words is "eleven trillion, one hundred twenty-one billion, two hundred ten million, one hundred twenty-one thousand, one".