202112021212021 has 8 divisors (see below), whose sum is σ = 202207101333120. Its totient is φ = 202016962082208.

The previous prime is 202112021212019. The next prime is 202112021212061. The reversal of 202112021212021 is 120212120211202.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 202112021212021 - 2¹ = 202112021212019 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 202112021212021.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (202112021212001) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (31) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 14030110 + ... + 24516688.

It is an arithmetic number, because the mean of its divisors is an integer number (25275887666640).

Almost surely, 2^{202112021212021} is an apocalyptic number.

It is an amenable number.

202112021212021 is a deficient number, since it is larger than the sum of its proper divisors (95080121099).

202112021212021 is a wasteful number, since it uses less digits than its factorization.

202112021212021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10495643.

The product of its (nonzero) digits is 128, while the sum is 19.

Adding to 202112021212021 its reverse (120212120211202), we get a palindrome (322324141423223).

The spelling of 202112021212021 in words is "two hundred two trillion, one hundred twelve billion, twenty-one million, two hundred twelve thousand, twenty-one".