21020222002201 has 4 divisors (see below), whose sum is σ = 21020231181312. Its totient is φ = 21020212823092.

The previous prime is 21020222002193. The next prime is 21020222002207. The reversal of 21020222002201 is 10220022202012.

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, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 21020222002201 - 2³ = 21020222002193 is a prime.

It is a super-3 number, since 3×21020222002201³ (a number of 41 digits) contains 333 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21020222002207) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1980876 + ... + 6779698.

It is an arithmetic number, because the mean of its divisors is an integer number (5255057795328).

Almost surely, 2^{21020222002201} is an apocalyptic number.

It is an amenable number.

21020222002201 is a deficient number, since it is larger than the sum of its proper divisors (9179111).

21020222002201 is an equidigital number, since it uses as much as digits as its factorization.

21020222002201 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9179110.

The product of its (nonzero) digits is 128, while the sum is 16.

Adding to 21020222002201 its reverse (10220022202012), we get a palindrome (31240244204213).

The spelling of 21020222002201 in words is "twenty-one trillion, twenty billion, two hundred twenty-two million, two thousand, two hundred one".