202120022221001 has 4 divisors (see below), whose sum is σ = 210907849274112. Its totient is φ = 193332195167892.

The previous prime is 202120022220997. The next prime is 202120022221009. The reversal of 202120022221001 is 100122220021202.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 202120022221001 - 2² = 202120022220997 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (202120022221009) 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 3 ways as a sum of consecutive naturals, for example, 4393913526521 + ... + 4393913526566.

It is an arithmetic number, because the mean of its divisors is an integer number (52726962318528).

Almost surely, 2^{202120022221001} is an apocalyptic number.

It is an amenable number.

202120022221001 is a deficient number, since it is larger than the sum of its proper divisors (8787827053111).

202120022221001 is an equidigital number, since it uses as much as digits as its factorization.

202120022221001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8787827053110.

The product of its (nonzero) digits is 128, while the sum is 17.

Adding to 202120022221001 its reverse (100122220021202), we get a palindrome (302242242242203).

The spelling of 202120022221001 in words is "two hundred two trillion, one hundred twenty billion, twenty-two million, two hundred twenty-one thousand, one".