1011221201121 has 8 divisors (see below), whose sum is σ = 1384735338624. Its totient is φ = 655927265520.

The previous prime is 1011221201119. The next prime is 1011221201141. The reversal of 1011221201121 is 1211021221101.

It is a happy number.

1011221201121 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1011221201121 - 2¹ = 1011221201119 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1011221201121.

It is not an unprimeable number, because it can be changed into a prime (1011221201141) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4555050345 + ... + 4555050566.

It is an arithmetic number, because the mean of its divisors is an integer number (173091917328).

Almost surely, 2^{1011221201121} is an apocalyptic number.

It is an amenable number.

1011221201121 is a deficient number, since it is larger than the sum of its proper divisors (373514137503).

1011221201121 is an equidigital number, since it uses as much as digits as its factorization.

1011221201121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9110100951.

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

Adding to 1011221201121 its reverse (1211021221101), we get a palindrome (2222242422222).

The spelling of 1011221201121 in words is "one trillion, eleven billion, two hundred twenty-one million, two hundred one thousand, one hundred twenty-one".