221002021201220 has 96 divisors (see below), whose sum is σ = 558522692689920. Its totient is φ = 71758169827200.

The previous prime is 221002021201217. The next prime is 221002021201237. The reversal of 221002021201220 is 22102120200122.

It is a happy number.

It is a super-3 number, since 3×221002021201220³ (a number of 44 digits) contains 333 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 7653056 + ... + 22373495.

It is an arithmetic number, because the mean of its divisors is an integer number (5817944715520).

Almost surely, 2^{221002021201220} is an apocalyptic number.

221002021201220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

221002021201220 is an abundant number, since it is smaller than the sum of its proper divisors (337520671488700).

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

221002021201220 is a wasteful number, since it uses less digits than its factorization.

221002021201220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30029353 (or 30029351 counting only the distinct ones).

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

Adding to 221002021201220 its reverse (22102120200122), we get a palindrome (243104141401342).

The spelling of 221002021201220 in words is "two hundred twenty-one trillion, two billion, twenty-one million, two hundred one thousand, two hundred twenty".