1011122001 has 32 divisors (see below), whose sum is σ = 1514688000. Its totient is φ = 666596304.

The previous prime is 1011121997. The next prime is 1011122011. The reversal of 1011122001 is 1002211101.

It is a happy number.

It is not a de Polignac number, because 1011122001 - 2² = 1011121997 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (9).

It is not an unprimeable number, because it can be changed into a prime (1011122011) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1572186 + ... + 1572828.

It is an arithmetic number, because the mean of its divisors is an integer number (47334000).

Almost surely, 2^1011122001 is an apocalyptic number.

It is an amenable number.

1011122001 is a deficient number, since it is larger than the sum of its proper divisors (503565999).

1011122001 is a wasteful number, since it uses less digits than its factorization.

1011122001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1210 (or 1204 counting only the distinct ones).

The product of its (nonzero) digits is 4, while the sum is 9.

The square root of 1011122001 is about 31798.1446156847. The cubic root of 1011122001 is about 1003.6936736438.

Adding to 1011122001 its reverse (1002211101), we get a palindrome (2013333102).

The spelling of 1011122001 in words is "one billion, eleven million, one hundred twenty-two thousand, one".