1121022001 has 16 divisors (see below), whose sum is σ = 1279433088. Its totient is φ = 972259200.

The previous prime is 1121021977. The next prime is 1121022011. The reversal of 1121022001 is 1002201211.

It is not a de Polignac number, because 1121022001 - 2⁷ = 1121021873 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1121022011) 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, 94861 + ... + 106021.

It is an arithmetic number, because the mean of its divisors is an integer number (79964568).

Almost surely, 2^1121022001 is an apocalyptic number.

1121022001 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1121022001 is a deficient number, since it is larger than the sum of its proper divisors (158411087).

1121022001 is a wasteful number, since it uses less digits than its factorization.

1121022001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11592.

The product of its (nonzero) digits is 8, while the sum is 10.

The square root of 1121022001 is about 33481.6666401181. Note that the first 4 decimals coincide. The cubic root of 1121022001 is about 1038.8146013731.

Adding to 1121022001 its reverse (1002201211), we get a palindrome (2123223212).

It can be divided in two parts, 11 and 21022001, that added together give a palindrome (21022012).

The spelling of 1121022001 in words is "one billion, one hundred twenty-one million, twenty-two thousand, one".