10001211511 has 4 divisors (see below), whose sum is σ = 10006061472. Its totient is φ = 9996361552.

The previous prime is 10001211497. The next prime is 10001211547. The reversal of 10001211511 is 11511210001.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 10001211511 - 2¹⁵ = 10001178743 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 10001211491 and 10001211500.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10001211581) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2421886 + ... + 2426011.

It is an arithmetic number, because the mean of its divisors is an integer number (2501515368).

Almost surely, 2^10001211511 is an apocalyptic number.

10001211511 is a deficient number, since it is larger than the sum of its proper divisors (4849961).

10001211511 is an equidigital number, since it uses as much as digits as its factorization.

10001211511 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4849960.

The product of its (nonzero) digits is 10, while the sum is 13.

Adding to 10001211511 its reverse (11511210001), we get a palindrome (21512421512).

The spelling of 10001211511 in words is "ten billion, one million, two hundred eleven thousand, five hundred eleven".