20020200121001 has 8 divisors (see below), whose sum is σ = 20022605810760. Its totient is φ = 20017794609792.

The previous prime is 20020200120979. The next prime is 20020200121037. The reversal of 20020200121001 is 10012100202002.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 1396651240000 + 18623548881001 = 1181800^2 + 4315501^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 20020200121001 - 2⁴² = 15622153609897 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20020200121501) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 421338821 + ... + 421386333.

It is an arithmetic number, because the mean of its divisors is an integer number (2502825726345).

Almost surely, 2^{20020200121001} is an apocalyptic number.

It is an amenable number.

20020200121001 is a deficient number, since it is larger than the sum of its proper divisors (2405689759).

20020200121001 is a wasteful number, since it uses less digits than its factorization.

20020200121001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 89275.

The product of its (nonzero) digits is 16, while the sum is 11.

Adding to 20020200121001 its reverse (10012100202002), we get a palindrome (30032300323003).

The spelling of 20020200121001 in words is "twenty trillion, twenty billion, two hundred million, one hundred twenty-one thousand, one".