1001211123 has 48 divisors (see below), whose sum is σ = 1522578816. Its totient is φ = 580320000.

The previous prime is 1001211121. The next prime is 1001211163. The reversal of 1001211123 is 3211121001.

It is not a de Polignac number, because 1001211123 - 2¹ = 1001211121 is a prime.

It is a super-2 number, since 2×1001211123² = 2004847425637842258, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1001211099 and 1001211108.

It is not an unprimeable number, because it can be changed into a prime (1001211121) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 4154283 + ... + 4154523.

It is an arithmetic number, because the mean of its divisors is an integer number (31720392).

Almost surely, 2^1001211123 is an apocalyptic number.

1001211123 is a deficient number, since it is larger than the sum of its proper divisors (521367693).

1001211123 is a wasteful number, since it uses less digits than its factorization.

1001211123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 448 (or 417 counting only the distinct ones).

The product of its (nonzero) digits is 12, while the sum is 12.

The square root of 1001211123 is about 31641.9203431144. The cubic root of 1001211123 is about 1000.4035447964.

Adding to 1001211123 its reverse (3211121001), we get a palindrome (4212332124).

The spelling of 1001211123 in words is "one billion, one million, two hundred eleven thousand, one hundred twenty-three".