20012020122021 has 16 divisors (see below), whose sum is σ = 26749085309760. Its totient is φ = 13308157981440.

The previous prime is 20012020122019. The next prime is 20012020122047. The reversal of 20012020122021 is 12022102021002.

It is not a de Polignac number, because 20012020122021 - 2¹ = 20012020122019 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20012020122001) 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, 10381885 + ... + 12157613.

It is an arithmetic number, because the mean of its divisors is an integer number (1671817831860).

Almost surely, 2^{20012020122021} is an apocalyptic number.

It is an amenable number.

20012020122021 is a deficient number, since it is larger than the sum of its proper divisors (6737065187739).

20012020122021 is a wasteful number, since it uses less digits than its factorization.

20012020122021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1785076.

The product of its (nonzero) digits is 64, while the sum is 15.

Adding to 20012020122021 its reverse (12022102021002), we get a palindrome (32034122143023).

The spelling of 20012020122021 in words is "twenty trillion, twelve billion, twenty million, one hundred twenty-two thousand, twenty-one".