221002020202001 has 4 divisors (see below), whose sum is σ = 228131117627904. Its totient is φ = 213872922776100.

The previous prime is 221002020201971. The next prime is 221002020202031. The reversal of 221002020202001 is 100202020200122.

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 an interprime number because it is at equal distance from previous prime (221002020201971) and next prime (221002020202031).

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-221002020202001 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (221002020202031) 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, 3564548712905 + ... + 3564548712966.

It is an arithmetic number, because the mean of its divisors is an integer number (57032779406976).

Almost surely, 2^{221002020202001} is an apocalyptic number.

It is an amenable number.

221002020202001 is a deficient number, since it is larger than the sum of its proper divisors (7129097425903).

221002020202001 is an equidigital number, since it uses as much as digits as its factorization.

221002020202001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7129097425902.

The product of its (nonzero) digits is 64, while the sum is 14.

Adding to 221002020202001 its reverse (100202020200122), we get a palindrome (321204040402123).

It can be divided in two parts, 22 and 1002020202001, that multiplied together give a palindrome (22044444444022).

The spelling of 221002020202001 in words is "two hundred twenty-one trillion, two billion, twenty million, two hundred two thousand, one".