221982220220 has 48 divisors (see below), whose sum is σ = 494641274400. Its totient is φ = 83390767104.

The previous prime is 221982220219. The next prime is 221982220253. The reversal of 221982220220 is 22022289122.

It is a super-2 number, since 2×221982220220² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 540245 + ... + 857804.

It is an arithmetic number, because the mean of its divisors is an integer number (10305026550).

Almost surely, 2^221982220220 is an apocalyptic number.

221982220220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

221982220220 is an abundant number, since it is smaller than the sum of its proper divisors (272659054180).

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

221982220220 is a wasteful number, since it uses less digits than its factorization.

221982220220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1398542 (or 1398540 counting only the distinct ones).

The product of its (nonzero) digits is 9216, while the sum is 32.

The spelling of 221982220220 in words is "two hundred twenty-one billion, nine hundred eighty-two million, two hundred twenty thousand, two hundred twenty".