20020100121001 has 4 divisors (see below), whose sum is σ = 20061895737600. Its totient is φ = 19978304504404.

The previous prime is 20020100120989. The next prime is 20020100121017. The reversal of 20020100121001 is 10012100102002.

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 20020100121001 - 2⁴³ = 11224007098793 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20020100121061) 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, 20897807581 + ... + 20897808538.

It is an arithmetic number, because the mean of its divisors is an integer number (5015473934400).

Almost surely, 2^{20020100121001} is an apocalyptic number.

It is an amenable number.

20020100121001 is a deficient number, since it is larger than the sum of its proper divisors (41795616599).

20020100121001 is an equidigital number, since it uses as much as digits as its factorization.

20020100121001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41795616598.

The product of its (nonzero) digits is 8, while the sum is 10.

Adding to 20020100121001 its reverse (10012100102002), we get a palindrome (30032200223003).

It can be divided in two parts, 200201001 and 21001, that added together give a palindrome (200222002).

The spelling of 20020100121001 in words is "twenty trillion, twenty billion, one hundred million, one hundred twenty-one thousand, one".