10111020101221 has 12 divisors (see below), whose sum is σ = 11015788873728. Its totient is φ = 9275990100624.

The previous prime is 10111020101183. The next prime is 10111020101249. The reversal of 10111020101221 is 12210102011101.

It is a happy number.

10111020101221 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 10111020101221 - 2¹³ = 10111020093029 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (13).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10111020101261) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 183495525 + ... + 183550618.

It is an arithmetic number, because the mean of its divisors is an integer number (917982406144).

Almost surely, 2^{10111020101221} is an apocalyptic number.

It is an amenable number.

10111020101221 is a deficient number, since it is larger than the sum of its proper divisors (904768772507).

10111020101221 is a wasteful number, since it uses less digits than its factorization.

10111020101221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 367046332 (or 367046319 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 13.

Adding to 10111020101221 its reverse (12210102011101), we get a palindrome (22321122112322).

The spelling of 10111020101221 in words is "ten trillion, one hundred eleven billion, twenty million, one hundred one thousand, two hundred twenty-one".