221220122002000 has 160 divisors (see below), whose sum is σ = 608909698785024. Its totient is φ = 76946129216000.

The previous prime is 221220122001979. The next prime is 221220122002039. The reversal of 221220122002000 is 200221022122.

It is a Harshad number since it is a multiple of its sum of digits (16).

It is a congruent number.

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, 218090959 + ... + 219102958.

Almost surely, 2^{221220122002000} is an apocalyptic number.

221220122002000 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

221220122002000 is an abundant number, since it is smaller than the sum of its proper divisors (387689576783024).

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

221220122002000 is a wasteful number, since it uses less digits than its factorization.

221220122002000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 437193974 (or 437193958 counting only the distinct ones).

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

Adding to 221220122002000 its reverse (200221022122), we get a palindrome (221420343024122).

The spelling of 221220122002000 in words is "two hundred twenty-one trillion, two hundred twenty billion, one hundred twenty-two million, two thousand".