20212001010021 has 32 divisors (see below), whose sum is σ = 27122454577152. Its totient is φ = 13388396898240.

The previous prime is 20212001009971. The next prime is 20212001010041. The reversal of 20212001010021 is 12001010021202.

It is not a de Polignac number, because 20212001010021 - 2⁶ = 20212001009957 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 20212001009979 and 20212001010006.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20212001010041) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1185237531 + ... + 1185254583.

It is an arithmetic number, because the mean of its divisors is an integer number (847576705536).

Almost surely, 2^{20212001010021} is an apocalyptic number.

It is an amenable number.

20212001010021 is a deficient number, since it is larger than the sum of its proper divisors (6910453567131).

20212001010021 is a wasteful number, since it uses less digits than its factorization.

20212001010021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21153.

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

Adding to 20212001010021 its reverse (12001010021202), we get a palindrome (32213011031223).

It can be divided in two parts, 202 and 12001010021, that multiplied together give a palindrome (2424204024242).

The spelling of 20212001010021 in words is "twenty trillion, two hundred twelve billion, one million, ten thousand, twenty-one".