11211211002021 has 16 divisors (see below), whose sum is σ = 15601795715520. Its totient is φ = 7154262577280.

The previous prime is 11211211002011. The next prime is 11211211002037. The reversal of 11211211002021 is 12020011211211.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 11211211002021 - 2⁶ = 11211211001957 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11211211002011) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 859880811 + ... + 859893848.

It is an arithmetic number, because the mean of its divisors is an integer number (975112232220).

Almost surely, 2^{11211211002021} is an apocalyptic number.

It is an amenable number.

11211211002021 is a deficient number, since it is larger than the sum of its proper divisors (4390584713499).

11211211002021 is a wasteful number, since it uses less digits than its factorization.

11211211002021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1719774756.

The product of its (nonzero) digits is 16, while the sum is 15.

Adding to 11211211002021 its reverse (12020011211211), we get a palindrome (23231222213232).

The spelling of 11211211002021 in words is "eleven trillion, two hundred eleven billion, two hundred eleven million, two thousand, twenty-one".