121020020011001 has 4 divisors (see below), whose sum is σ = 121025342168400. Its totient is φ = 121014697853604.

The previous prime is 121020020010943. The next prime is 121020020011031. The reversal of 121020020011001 is 100110020020121.

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 121020020011001 - 2⁶ = 121020020010937 is a prime.

It is a super-2 number, since 2×121020020011001² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (121020020011031) 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, 2661044591 + ... + 2661090068.

It is an arithmetic number, because the mean of its divisors is an integer number (30256335542100).

Almost surely, 2^{121020020011001} is an apocalyptic number.

It is an amenable number.

121020020011001 is a deficient number, since it is larger than the sum of its proper divisors (5322157399).

121020020011001 is an equidigital number, since it uses as much as digits as its factorization.

121020020011001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5322157398.

The product of its (nonzero) digits is 8, while the sum is 11.

Adding to 121020020011001 its reverse (100110020020121), we get a palindrome (221130040031122).

The spelling of 121020020011001 in words is "one hundred twenty-one trillion, twenty billion, twenty million, eleven thousand, one".