211220212111210 has 16 divisors (see below), whose sum is σ = 380197736296416. Its totient is φ = 84487783845328.

The previous prime is 211220212111201. The next prime is 211220212111243. The reversal of 211220212111210 is 12111212022112.

It is a happy number.

It is a super-2 number, since 2×211220212111210² (a number of 29 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 34666552 + ... + 40301491.

It is an arithmetic number, because the mean of its divisors is an integer number (23762358518526).

Almost surely, 2^{211220212111210} is an apocalyptic number.

211220212111210 is a deficient number, since it is larger than the sum of its proper divisors (168977524185206).

211220212111210 is a wasteful number, since it uses less digits than its factorization.

211220212111210 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 75249797.

The product of its (nonzero) digits is 64, while the sum is 19.

Adding to 211220212111210 its reverse (12111212022112), we get a palindrome (223331424133322).

The spelling of 211220212111210 in words is "two hundred eleven trillion, two hundred twenty billion, two hundred twelve million, one hundred eleven thousand, two hundred ten".