20212102212021 has 16 divisors (see below), whose sum is σ = 30099004645120. Its totient is φ = 13404917525760.

The previous prime is 20212102212017. The next prime is 20212102212047. The reversal of 20212102212021 is 12021220121202.

It is a happy number.

20212102212021 is a `hidden beast` number, since 20 + 212 + 10 + 221 + 202 + 1 = 666.

It is not a de Polignac number, because 20212102212021 - 2² = 20212102212017 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20212102211985 and 20212102212003.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20212102212061) 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, 1939363645 + ... + 1939374066.

It is an arithmetic number, because the mean of its divisors is an integer number (1881187790320).

Almost surely, 2^{20212102212021} is an apocalyptic number.

It is an amenable number.

20212102212021 is a deficient number, since it is larger than the sum of its proper divisors (9886902433099).

20212102212021 is a wasteful number, since it uses less digits than its factorization.

20212102212021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3878737913 (or 3878737907 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 18.

Adding to 20212102212021 its reverse (12021220121202), we get a palindrome (32233322333223).

The spelling of 20212102212021 in words is "twenty trillion, two hundred twelve billion, one hundred two million, two hundred twelve thousand, twenty-one".