1011121221103 has 16 divisors (see below), whose sum is σ = 1192040879104. Its totient is φ = 839744120160.

The previous prime is 1011121221031. The next prime is 1011121221157. The reversal of 1011121221103 is 3011221211101.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 1011121221103 - 2²¹ = 1011119123951 is a prime.

It is a super-2 number, since 2×1011121221103² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1011121251103) 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, 17642775 + ... + 17699992.

It is an arithmetic number, because the mean of its divisors is an integer number (74502554944).

Almost surely, 2^{1011121221103} is an apocalyptic number.

1011121221103 is a deficient number, since it is larger than the sum of its proper divisors (180919658001).

1011121221103 is an equidigital number, since it uses as much as digits as its factorization.

1011121221103 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35342902.

The product of its (nonzero) digits is 24, while the sum is 16.

Adding to 1011121221103 its reverse (3011221211101), we get a palindrome (4022342432204).

The spelling of 1011121221103 in words is "one trillion, eleven billion, one hundred twenty-one million, two hundred twenty-one thousand, one hundred three".