1001121020101 has 4 divisors (see below), whose sum is σ = 1003909658400. Its totient is φ = 998332381804.

The previous prime is 1001121020093. The next prime is 1001121020117. The reversal of 1001121020101 is 1010201211001.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1001121020101 - 2³ = 1001121020093 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1001121021101) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1394318611 + ... + 1394319328.

It is an arithmetic number, because the mean of its divisors is an integer number (250977414600).

Almost surely, 2^{1001121020101} is an apocalyptic number.

It is an amenable number.

1001121020101 is a deficient number, since it is larger than the sum of its proper divisors (2788638299).

1001121020101 is an equidigital number, since it uses as much as digits as its factorization.

1001121020101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2788638298.

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

Adding to 1001121020101 its reverse (1010201211001), we get a palindrome (2011322231102).

The spelling of 1001121020101 in words is "one trillion, one billion, one hundred twenty-one million, twenty thousand, one hundred one".