11012011221 has 16 divisors (see below), whose sum is σ = 14771877120. Its totient is φ = 7296788160.

The previous prime is 11012011211. The next prime is 11012011247. The reversal of 11012011221 is 12211021011.

It is not a de Polignac number, because 11012011221 - 2⁵ = 11012011189 is a prime.

It is a super-2 number, since 2×11012011221² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 11012011197 and 11012011206.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11012011211) 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, 1249396 + ... + 1258178.

It is an arithmetic number, because the mean of its divisors is an integer number (923242320).

Almost surely, 2^11012011221 is an apocalyptic number.

It is an amenable number.

11012011221 is a deficient number, since it is larger than the sum of its proper divisors (3759865899).

11012011221 is a wasteful number, since it uses less digits than its factorization.

11012011221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11276.

The product of its (nonzero) digits is 8, while the sum is 12.

Adding to 11012011221 its reverse (12211021011), we get a palindrome (23223032232).

The spelling of 11012011221 in words is "eleven billion, twelve million, eleven thousand, two hundred twenty-one".