101121221111 has 32 divisors (see below), whose sum is σ = 107569123200. Its totient is φ = 94919731200.

The previous prime is 101121221039. The next prime is 101121221129. The reversal of 101121221111 is 111122121101.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-101121221111 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 (101121221191) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 43793225 + ... + 43795533.

It is an arithmetic number, because the mean of its divisors is an integer number (3361535100).

Almost surely, 2^101121221111 is an apocalyptic number.

101121221111 is a deficient number, since it is larger than the sum of its proper divisors (6447902089).

101121221111 is a wasteful number, since it uses less digits than its factorization.

101121221111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2699.

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

Adding to 101121221111 its reverse (111122121101), we get a palindrome (212243342212).

The spelling of 101121221111 in words is "one hundred one billion, one hundred twenty-one million, two hundred twenty-one thousand, one hundred eleven".