202021211101021 has 8 divisors (see below), whose sum is σ = 218066086877184. Its totient is φ = 186048447126960.

The previous prime is 202021211100991. The next prime is 202021211101037. The reversal of 202021211101021 is 120101112120202.

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 202021211101021 - 2⁷ = 202021211100893 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 202021211100986 and 202021211101004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (202021211101091) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 18027944701 + ... + 18027955906.

It is an arithmetic number, because the mean of its divisors is an integer number (27258260859648).

Almost surely, 2^{202021211101021} is an apocalyptic number.

It is an amenable number.

202021211101021 is a deficient number, since it is larger than the sum of its proper divisors (16044875776163).

202021211101021 is a wasteful number, since it uses less digits than its factorization.

202021211101021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36055901051.

The product of its (nonzero) digits is 32, while the sum is 16.

Adding to 202021211101021 its reverse (120101112120202), we get a palindrome (322122323221223).

The spelling of 202021211101021 in words is "two hundred two trillion, twenty-one billion, two hundred eleven million, one hundred one thousand, twenty-one".