212221012221210 has 64 divisors (see below), whose sum is σ = 525897977610240. Its totient is φ = 54752386328640.

The previous prime is 212221012221199. The next prime is 212221012221271. The reversal of 212221012221210 is 12122210122212.

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, 26289580 + ... + 33400359.

It is an arithmetic number, because the mean of its divisors is an integer number (8217155900160).

Almost surely, 2^{212221012221210} is an apocalyptic number.

212221012221210 is an abundant number, since it is smaller than the sum of its proper divisors (313676965389030).

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

212221012221210 is a wasteful number, since it uses less digits than its factorization.

212221012221210 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 59693803.

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

Adding to 212221012221210 its reverse (12122210122212), we get a palindrome (224343222343422).

The spelling of 212221012221210 in words is "two hundred twelve trillion, two hundred twenty-one billion, twelve million, two hundred twenty-one thousand, two hundred ten".