1020121121001 has 4 divisors (see below), whose sum is σ = 1360161494672. Its totient is φ = 680080747332.

The previous prime is 1020121120987. The next prime is 1020121121021. The reversal of 1020121121001 is 1001211210201.

1020121121001 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 not a de Polignac number, because 1020121121001 - 2³³ = 1011531186409 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1020121121021) 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, 170020186831 + ... + 170020186836.

It is an arithmetic number, because the mean of its divisors is an integer number (340040373668).

Almost surely, 2^{1020121121001} is an apocalyptic number.

It is an amenable number.

1020121121001 is a deficient number, since it is larger than the sum of its proper divisors (340040373671).

1020121121001 is an equidigital number, since it uses as much as digits as its factorization.

1020121121001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 340040373670.

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

Adding to 1020121121001 its reverse (1001211210201), we get a palindrome (2021332331202).

The spelling of 1020121121001 in words is "one trillion, twenty billion, one hundred twenty-one million, one hundred twenty-one thousand, one".