211221220101202 has 8 divisors (see below), whose sum is σ = 316858605462396. Its totient is φ = 105601684947072.

The previous prime is 211221220101137. The next prime is 211221220101253. The reversal of 211221220101202 is 202101022122112.

It can be written as a sum of positive squares in 2 ways, for example, as 153569074505401 + 57652145595801 = 12392299^2 + 7592901^2 .

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

It is a super-2 number, since 2×211221220101202² (a number of 29 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 211221220101202.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4462522183 + ... + 4462569514.

Almost surely, 2^{211221220101202} is an apocalyptic number.

211221220101202 is a deficient number, since it is larger than the sum of its proper divisors (105637385361194).

211221220101202 is a wasteful number, since it uses less digits than its factorization.

211221220101202 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8925103532.

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

Adding to 211221220101202 its reverse (202101022122112), we get a palindrome (413322242223314).

The spelling of 211221220101202 in words is "two hundred eleven trillion, two hundred twenty-one billion, two hundred twenty million, one hundred one thousand, two hundred two".