10111011001221 has 128 divisors (see below), whose sum is σ = 15937689600000. Its totient is φ = 5644758712320.

The previous prime is 10111011001219. The next prime is 10111011001283. The reversal of 10111011001221 is 12210011011101.

It is not a de Polignac number, because 10111011001221 - 2¹ = 10111011001219 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 10111011001197 and 10111011001206.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10111011001211) by changing a digit.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 2763324490 + ... + 2763328148.

It is an arithmetic number, because the mean of its divisors is an integer number (124513200000).

Almost surely, 2^{10111011001221} is an apocalyptic number.

It is an amenable number.

10111011001221 is a deficient number, since it is larger than the sum of its proper divisors (5826678598779).

10111011001221 is a wasteful number, since it uses less digits than its factorization.

10111011001221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5059.

The product of its (nonzero) digits is 4, while the sum is 12.

Adding to 10111011001221 its reverse (12210011011101), we get a palindrome (22321022012322).

The spelling of 10111011001221 in words is "ten trillion, one hundred eleven billion, eleven million, one thousand, two hundred twenty-one".