211222121020210 has 16 divisors (see below), whose sum is σ = 393310156383000. Its totient is φ = 81575439842176.

The previous prime is 211222121020147. The next prime is 211222121020241. The reversal of 211222121020210 is 12020121222112.

It can be written as a sum of positive squares in 4 ways, for example, as 166815797286961 + 44406323733249 = 12915719^2 + 6663807^2 .

It is a super-2 number, since 2×211222121020210² (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, 364176070435 + ... + 364176071014.

Almost surely, 2^{211222121020210} is an apocalyptic number.

211222121020210 is a deficient number, since it is larger than the sum of its proper divisors (182088035362790).

211222121020210 is a wasteful number, since it uses less digits than its factorization.

211222121020210 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 728352141485.

The product of its (nonzero) digits is 128, while the sum is 19.

Adding to 211222121020210 its reverse (12020121222112), we get a palindrome (223242242242322).

The spelling of 211222121020210 in words is "two hundred eleven trillion, two hundred twenty-two billion, one hundred twenty-one million, twenty thousand, two hundred ten".