212021111212210 has 16 divisors (see below), whose sum is σ = 383122972949976. Its totient is φ = 84478450536448.

The previous prime is 212021111212159. The next prime is 212021111212271. The reversal of 212021111212210 is 12212111120212.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 207495871850089 + 4525239362121 = 14404717^2 + 2127261^2 .

It is a super-4 number, since 4×212021111212210⁴ (a number of 58 digits) contains 4444 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 41249240857 + ... + 41249245996.

Almost surely, 2^{212021111212210} is an apocalyptic number.

212021111212210 is a deficient number, since it is larger than the sum of its proper divisors (171101861737766).

212021111212210 is a wasteful number, since it uses less digits than its factorization.

212021111212210 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 82498487117.

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

Adding to 212021111212210 its reverse (12212111120212), we get a palindrome (224233222332422).

The spelling of 212021111212210 in words is "two hundred twelve trillion, twenty-one billion, one hundred eleven million, two hundred twelve thousand, two hundred ten".