1011121120172 has 12 divisors (see below), whose sum is σ = 1771117217520. Its totient is φ = 505087629456.

The previous prime is 1011121120171. The next prime is 1011121120183. The reversal of 1011121120172 is 2710211211101.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (1011121120171) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 118227848 + ... + 118236399.

It is an arithmetic number, because the mean of its divisors is an integer number (147593101460).

Almost surely, 2^{1011121120172} is an apocalyptic number.

It is an amenable number.

1011121120172 is a deficient number, since it is larger than the sum of its proper divisors (759996097348).

1011121120172 is a wasteful number, since it uses less digits than its factorization.

1011121120172 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 236465320 (or 236465318 counting only the distinct ones).

The product of its (nonzero) digits is 56, while the sum is 20.

Adding to 1011121120172 its reverse (2710211211101), we get a palindrome (3721332331273).

The spelling of 1011121120172 in words is "one trillion, eleven billion, one hundred twenty-one million, one hundred twenty thousand, one hundred seventy-two".