1011001220121 has 8 divisors (see below), whose sum is σ = 1365064938880. Its totient is φ = 665469157392.

The previous prime is 1011001220081. The next prime is 1011001220129. The reversal of 1011001220121 is 1210221001101.

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

It is not a de Polignac number, because 1011001220121 - 2⁷ = 1011001219993 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 1011001220097 and 1011001220106.

It is not an unprimeable number, because it can be changed into a prime (1011001220129) 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, 2132913730 + ... + 2132914203.

It is an arithmetic number, because the mean of its divisors is an integer number (170633117360).

Almost surely, 2^{1011001220121} is an apocalyptic number.

It is an amenable number.

1011001220121 is a deficient number, since it is larger than the sum of its proper divisors (354063718759).

1011001220121 is an equidigital number, since it uses as much as digits as its factorization.

1011001220121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4265828015.

The product of its (nonzero) digits is 8, while the sum is 12.

Adding to 1011001220121 its reverse (1210221001101), we get a palindrome (2221222221222).

The spelling of 1011001220121 in words is "one trillion, eleven billion, one million, two hundred twenty thousand, one hundred twenty-one".