1121021011001 has 8 divisors (see below), whose sum is σ = 1127748899784. Its totient is φ = 1114295973120.

The previous prime is 1121021010973. The next prime is 1121021011049. The reversal of 1121021011001 is 1001101201211.

It can be written as a sum of positive squares in 4 ways, for example, as 37423289401 + 1083597721600 = 193451^2 + 1040960^2 .

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 1121021011001 - 2²² = 1121016816697 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1121021011301) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 78695 + ... + 1499411.

It is an arithmetic number, because the mean of its divisors is an integer number (140968612473).

Almost surely, 2^{1121021011001} is an apocalyptic number.

It is an amenable number.

1121021011001 is a deficient number, since it is larger than the sum of its proper divisors (6727888783).

1121021011001 is a wasteful number, since it uses less digits than its factorization.

1121021011001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1425451.

The product of its (nonzero) digits is 4, while the sum is 11.

Adding to 1121021011001 its reverse (1001101201211), we get a palindrome (2122122212212).

The spelling of 1121021011001 in words is "one trillion, one hundred twenty-one billion, twenty-one million, eleven thousand, one".