211221122013210 has 128 divisors (see below), whose sum is σ = 580270428391680. Its totient is φ = 48864878014464.

The previous prime is 211221122013163. The next prime is 211221122013257. The reversal of 211221122013210 is 12310221122112.

It is an interprime number because it is at equal distance from previous prime (211221122013163) and next prime (211221122013257).

It is a super-2 number, since 2×211221122013210² (a number of 29 digits) contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 294206949 + ... + 294924008.

It is an arithmetic number, because the mean of its divisors is an integer number (4533362721810).

Almost surely, 2^{211221122013210} is an apocalyptic number.

211221122013210 is an abundant number, since it is smaller than the sum of its proper divisors (369049306378470).

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

211221122013210 is a wasteful number, since it uses less digits than its factorization.

211221122013210 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 589131040.

The product of its (nonzero) digits is 192, while the sum is 21.

Adding to 211221122013210 its reverse (12310221122112), we get a palindrome (223531343135322).

The spelling of 211221122013210 in words is "two hundred eleven trillion, two hundred twenty-one billion, one hundred twenty-two million, thirteen thousand, two hundred ten".