11211012021021 has 16 divisors (see below), whose sum is σ = 15062408557248. Its totient is φ = 7416850032000.

The previous prime is 11211012020987. The next prime is 11211012021023. The reversal of 11211012021021 is 12012021011211.

It is a happy number.

It is not a de Polignac number, because 11211012021021 - 2¹⁹ = 11211011496733 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11211012021023) 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, 3612070 + ... + 5955591.

It is an arithmetic number, because the mean of its divisors is an integer number (941400534828).

Almost surely, 2^{11211012021021} is an apocalyptic number.

It is an amenable number.

11211012021021 is a deficient number, since it is larger than the sum of its proper divisors (3851396536227).

11211012021021 is a wasteful number, since it uses less digits than its factorization.

11211012021021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9570652.

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

Adding to 11211012021021 its reverse (12012021011211), we get a palindrome (23223033032232).

The spelling of 11211012021021 in words is "eleven trillion, two hundred eleven billion, twelve million, twenty-one thousand, twenty-one".