1011220121001 has 8 divisors (see below), whose sum is σ = 1355825861280. Its totient is φ = 670380564032.

The previous prime is 1011220120987. The next prime is 1011220121123. The reversal of 1011220121001 is 1001210221101.

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

It is a cyclic number.

It is not a de Polignac number, because 1011220121001 - 2¹⁰ = 1011220119977 is a prime.

It is a super-2 number, since 2×1011220121001² (a number of 25 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1011220129001) 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, 941545200 + ... + 941546273.

It is an arithmetic number, because the mean of its divisors is an integer number (169478232660).

Almost surely, 2^{1011220121001} is an apocalyptic number.

It is an amenable number.

1011220121001 is a deficient number, since it is larger than the sum of its proper divisors (344605740279).

1011220121001 is a wasteful number, since it uses less digits than its factorization.

1011220121001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1883091655.

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

Adding to 1011220121001 its reverse (1001210221101), we get a palindrome (2012430342102).

The spelling of 1011220121001 in words is "one trillion, eleven billion, two hundred twenty million, one hundred twenty-one thousand, one".