11021212001 has 4 divisors (see below), whose sum is σ = 11021506752. Its totient is φ = 11020917252.

The previous prime is 11021211983. The next prime is 11021212049. The reversal of 11021212001 is 10021212011.

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 a de Polignac number, because none of the positive numbers 2^k-11021212001 is a prime.

It is a super-2 number, since 2×11021212001² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11021212061) 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, 81461 + ... + 169346.

It is an arithmetic number, because the mean of its divisors is an integer number (2755376688).

Almost surely, 2^11021212001 is an apocalyptic number.

It is an amenable number.

11021212001 is a deficient number, since it is larger than the sum of its proper divisors (294751).

11021212001 is an equidigital number, since it uses as much as digits as its factorization.

11021212001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 294750.

The product of its (nonzero) digits is 8, while the sum is 11.

Adding to 11021212001 its reverse (10021212011), we get a palindrome (21042424012).

The spelling of 11021212001 in words is "eleven billion, twenty-one million, two hundred twelve thousand, one".