11211210001 has 4 divisors (see below), whose sum is σ = 11449746432. Its totient is φ = 10972673572.

The previous prime is 11211209951. The next prime is 11211210007. The reversal of 11211210001 is 10001211211.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 11211210001 - 2¹⁷ = 11211078929 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 11211210001.

It is not an unprimeable number, because it can be changed into a prime (11211210007) 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, 119268145 + ... + 119268238.

It is an arithmetic number, because the mean of its divisors is an integer number (2862436608).

Almost surely, 2^11211210001 is an apocalyptic number.

It is an amenable number.

11211210001 is a deficient number, since it is larger than the sum of its proper divisors (238536431).

11211210001 is an equidigital number, since it uses as much as digits as its factorization.

11211210001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 238536430.

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

Adding to 11211210001 its reverse (10001211211), we get a palindrome (21212421212).

The spelling of 11211210001 in words is "eleven billion, two hundred eleven million, two hundred ten thousand, one".