20012201010021 has 32 divisors (see below), whose sum is σ = 30066275819520. Its totient is φ = 11730083601600.

The previous prime is 20012201009989. The next prime is 20012201010023. The reversal of 20012201010021 is 12001010221002.

It is not a de Polignac number, because 20012201010021 - 2⁵ = 20012201009989 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 20012201009979 and 20012201010006.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20012201010023) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 4413841 + ... + 7714038.

It is an arithmetic number, because the mean of its divisors is an integer number (939571119360).

Almost surely, 2^{20012201010021} is an apocalyptic number.

It is an amenable number.

20012201010021 is a deficient number, since it is larger than the sum of its proper divisors (10054074809499).

20012201010021 is a wasteful number, since it uses less digits than its factorization.

20012201010021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12129537.

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

Adding to 20012201010021 its reverse (12001010221002), we get a palindrome (32013211231023).

It can be divided in two parts, 200 and 12201010021, that added together give a palindrome (12201010221).

The spelling of 20012201010021 in words is "twenty trillion, twelve billion, two hundred one million, ten thousand, twenty-one".