11211021020111 has 8 divisors (see below), whose sum is σ = 12230231630544. Its totient is φ = 10191814889920.

The previous prime is 11211021020071. The next prime is 11211021020117. The reversal of 11211021020111 is 11102012011211.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-11211021020111 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11211021020117) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6181721 + ... + 7786893.

It is an arithmetic number, because the mean of its divisors is an integer number (1528778953818).

Almost surely, 2^{11211021020111} is an apocalyptic number.

11211021020111 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

11211021020111 is a deficient number, since it is larger than the sum of its proper divisors (1019210610433).

11211021020111 is a wasteful number, since it uses less digits than its factorization.

11211021020111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2240121.

The product of its (nonzero) digits is 8, while the sum is 14.

Adding to 11211021020111 its reverse (11102012011211), we get a palindrome (22313033031322).

The spelling of 11211021020111 in words is "eleven trillion, two hundred eleven billion, twenty-one million, twenty thousand, one hundred eleven".