221001022002020 has 48 divisors (see below), whose sum is σ = 500047433786880. Its totient is φ = 81560357356416.

The previous prime is 221001022002011. The next prime is 221001022002029. The reversal of 221001022002020 is 20200220100122.

It is an interprime number because it is at equal distance from previous prime (221001022002011) and next prime (221001022002029).

It is a junction number, because it is equal to n+sod(n) for n = 221001022001986 and 221001022002004.

It is not an unprimeable number, because it can be changed into a prime (221001022002029) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 207906332 + ... + 208966611.

It is an arithmetic number, because the mean of its divisors is an integer number (10417654870560).

Almost surely, 2^{221001022002020} is an apocalyptic number.

221001022002020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

221001022002020 is an abundant number, since it is smaller than the sum of its proper divisors (279046411784860).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

221001022002020 is a wasteful number, since it uses less digits than its factorization.

221001022002020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 416875004 (or 416875002 counting only the distinct ones).

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

Adding to 221001022002020 its reverse (20200220100122), we get a palindrome (241201242102142).

The spelling of 221001022002020 in words is "two hundred twenty-one trillion, one billion, twenty-two million, two thousand, twenty".