20202121010001 has 16 divisors (see below), whose sum is σ = 30901234535424. Its totient is φ = 11500175346384.

The previous prime is 20202121009951. The next prime is 20202121010023. The reversal of 20202121010001 is 10001012120202.

It is not a de Polignac number, because 20202121010001 - 2²¹ = 20202118912849 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20202121010501) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1828902771 + ... + 1828913816.

It is an arithmetic number, because the mean of its divisors is an integer number (1931327158464).

Almost surely, 2^{20202121010001} is an apocalyptic number.

20202121010001 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

20202121010001 is a deficient number, since it is larger than the sum of its proper divisors (10699113525423).

20202121010001 is a wasteful number, since it uses less digits than its factorization.

20202121010001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3657816860.

The product of its (nonzero) digits is 16, while the sum is 12.

Adding to 20202121010001 its reverse (10001012120202), we get a palindrome (30203133130203).

The spelling of 20202121010001 in words is "twenty trillion, two hundred two billion, one hundred twenty-one million, ten thousand, one".