222121210221210 has 64 divisors (see below), whose sum is σ = 534153133342080. Its totient is φ = 59114313922560.

The previous prime is 222121210221193. The next prime is 222121210221233. The reversal of 222121210221210 is 12122012121222.

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, 216322801 + ... + 217347179.

It is an arithmetic number, because the mean of its divisors is an integer number (8346142708470).

Almost surely, 2^{222121210221210} is an apocalyptic number.

222121210221210 is an abundant number, since it is smaller than the sum of its proper divisors (312031923120870).

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

222121210221210 is a wasteful number, since it uses less digits than its factorization.

222121210221210 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1038783.

The product of its (nonzero) digits is 256, while the sum is 21.

Adding to 222121210221210 its reverse (12122012121222), we get a palindrome (234243222342432).

The spelling of 222121210221210 in words is "two hundred twenty-two trillion, one hundred twenty-one billion, two hundred ten million, two hundred twenty-one thousand, two hundred ten".