1101020121001 has 4 divisors (see below), whose sum is σ = 1138986332100. Its totient is φ = 1063053909904.

The previous prime is 1101020120971. The next prime is 1101020121101. The reversal of 1101020121001 is 1001210201011.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 630156542976 + 470863578025 = 793824^2 + 686195^2 .

It is not a de Polignac number, because 1101020121001 - 2¹⁷ = 1101019989929 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1101020121101) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 18983105506 + ... + 18983105563.

It is an arithmetic number, because the mean of its divisors is an integer number (284746583025).

Almost surely, 2^{1101020121001} is an apocalyptic number.

It is an amenable number.

1101020121001 is a deficient number, since it is larger than the sum of its proper divisors (37966211099).

1101020121001 is an equidigital number, since it uses as much as digits as its factorization.

1101020121001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 37966211098.

The product of its (nonzero) digits is 4, while the sum is 10.

Adding to 1101020121001 its reverse (1001210201011), we get a palindrome (2102230322012).

The spelling of 1101020121001 in words is "one trillion, one hundred one billion, twenty million, one hundred twenty-one thousand, one".