211212122021210 has 8 divisors (see below), whose sum is σ = 380181819638196. Its totient is φ = 84484848808480.

The previous prime is 211212122021191. The next prime is 211212122021237. The reversal of 211212122021210 is 12120221212112.

It can be written as a sum of positive squares in 2 ways, for example, as 170097441863881 + 41114680157329 = 13042141^2 + 6412073^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×211212122021210² (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 3 ways as a sum of consecutive naturals, for example, 10560606101051 + ... + 10560606101070.

Almost surely, 2^{211212122021210} is an apocalyptic number.

211212122021210 is a deficient number, since it is larger than the sum of its proper divisors (168969697616986).

211212122021210 is a wasteful number, since it uses less digits than its factorization.

211212122021210 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21121212202128.

The product of its (nonzero) digits is 128, while the sum is 20.

Adding to 211212122021210 its reverse (12120221212112), we get a palindrome (223332343233322).

The spelling of 211212122021210 in words is "two hundred eleven trillion, two hundred twelve billion, one hundred twenty-two million, twenty-one thousand, two hundred ten".