202121201012021 has 8 divisors (see below), whose sum is σ = 205611695050944. Its totient is φ = 198644641081920.

The previous prime is 202121201011997. The next prime is 202121201012051. The reversal of 202121201012021 is 120210102121202.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-202121201012021 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (202121201012051) 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 7 ways as a sum of consecutive naturals, for example, 3483497945 + ... + 3483555966.

It is an arithmetic number, because the mean of its divisors is an integer number (25701461881368).

Almost surely, 2^{202121201012021} is an apocalyptic number.

It is an amenable number.

202121201012021 is a deficient number, since it is larger than the sum of its proper divisors (3490494038923).

202121201012021 is an equidigital number, since it uses as much as digits as its factorization.

202121201012021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6967054411.

The product of its (nonzero) digits is 64, while the sum is 17.

Adding to 202121201012021 its reverse (120210102121202), we get a palindrome (322331303133223).

The spelling of 202121201012021 in words is "two hundred two trillion, one hundred twenty-one billion, two hundred one million, twelve thousand, twenty-one".