1011122012121 has 32 divisors (see below), whose sum is σ = 1454709473280. Its totient is φ = 621012135744.

The previous prime is 1011122012059. The next prime is 1011122012129. The reversal of 1011122012121 is 1212102211101.

It is a happy number.

It is not a de Polignac number, because 1011122012121 - 2⁷ = 1011122011993 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1011122012121.

It is not an unprimeable number, because it can be changed into a prime (1011122012129) 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, 44651520 + ... + 44674158.

It is an arithmetic number, because the mean of its divisors is an integer number (45459671040).

Almost surely, 2^{1011122012121} is an apocalyptic number.

It is an amenable number.

1011122012121 is a deficient number, since it is larger than the sum of its proper divisors (443587461159).

1011122012121 is a wasteful number, since it uses less digits than its factorization.

1011122012121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24845.

The product of its (nonzero) digits is 16, while the sum is 15.

Adding to 1011122012121 its reverse (1212102211101), we get a palindrome (2223224223222).

The spelling of 1011122012121 in words is "one trillion, eleven billion, one hundred twenty-two million, twelve thousand, one hundred twenty-one".