1121121001 has 16 divisors (see below), whose sum is σ = 1505282688. Its totient is φ = 806400000.

The previous prime is 1121120971. The next prime is 1121121017. The reversal of 1121121001 is 1001211211.

It is not a de Polignac number, because 1121121001 - 2¹¹ = 1121118953 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1121101001) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 559000 + ... + 561001.

It is an arithmetic number, because the mean of its divisors is an integer number (94080168).

Almost surely, 2^1121121001 is an apocalyptic number.

1121121001 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1121121001 is a deficient number, since it is larger than the sum of its proper divisors (384161687).

1121121001 is a wasteful number, since it uses less digits than its factorization.

1121121001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1120032.

The product of its (nonzero) digits is 4, while the sum is 10.

The square root of 1121121001 is about 33483.1450285065. The cubic root of 1121121001 is about 1038.8451804989.

Adding to 1121121001 its reverse (1001211211), we get a palindrome (2122332212).

The spelling of 1121121001 in words is "one billion, one hundred twenty-one million, one hundred twenty-one thousand, one".