11211021020221 has 16 divisors (see below), whose sum is σ = 12395885741568. Its totient is φ = 10054498392000.

The previous prime is 11211021020219. The next prime is 11211021020261. The reversal of 11211021020221 is 12202012011211.

11211021020221 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a cyclic number.

It is not a de Polignac number, because 11211021020221 - 2¹ = 11211021020219 is a prime.

It is a super-2 number, since 2×11211021020221² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 11211021020195 and 11211021020204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11211021020261) 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, 17906925 + ... + 18522418.

It is an arithmetic number, because the mean of its divisors is an integer number (774742858848).

Almost surely, 2^{11211021020221} is an apocalyptic number.

11211021020221 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

11211021020221 is a deficient number, since it is larger than the sum of its proper divisors (1184864721347).

11211021020221 is a wasteful number, since it uses less digits than its factorization.

11211021020221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36429732.

The product of its (nonzero) digits is 32, while the sum is 16.

Adding to 11211021020221 its reverse (12202012011211), we get a palindrome (23413033031432).

The spelling of 11211021020221 in words is "eleven trillion, two hundred eleven billion, twenty-one million, twenty thousand, two hundred twenty-one".