202221201001021 has 8 divisors (see below), whose sum is σ = 204228060233688. Its totient is φ = 200214433320000.

The previous prime is 202221201001007. The next prime is 202221201001069. The reversal of 202221201001021 is 120100102122202.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 77821508722500 + 124399692278521 = 8821650^2 + 11153461^2 .

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 202221201001021 - 2¹⁷ = 202221200869949 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 202221201000986 and 202221201001004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (202221201001121) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 18444090 + ... + 27287851.

It is an arithmetic number, because the mean of its divisors is an integer number (25528507529211).

Almost surely, 2^{202221201001021} is an apocalyptic number.

It is an amenable number.

202221201001021 is a deficient number, since it is larger than the sum of its proper divisors (2006859232667).

202221201001021 is a wasteful number, since it uses less digits than its factorization.

202221201001021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 45775823.

The product of its (nonzero) digits is 64, while the sum is 16.

Adding to 202221201001021 its reverse (120100102122202), we get a palindrome (322321303123223).

The spelling of 202221201001021 in words is "two hundred two trillion, two hundred twenty-one billion, two hundred one million, one thousand, twenty-one".