211220102021201 has 16 divisors (see below), whose sum is σ = 260598809385600. Its totient is φ = 166710597164928.

The previous prime is 211220102021083. The next prime is 211220102021213. The reversal of 211220102021201 is 102120201022112.

It is a cyclic number.

It is not a de Polignac number, because 211220102021201 - 2¹⁰ = 211220102020177 is a prime.

It is a super-2 number, since 2×211220102021201² (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 211220102021201.

It is not an unprimeable number, because it can be changed into a prime (211220102021221) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2837493371 + ... + 2837567808.

It is an arithmetic number, because the mean of its divisors is an integer number (16287425586600).

Almost surely, 2^{211220102021201} is an apocalyptic number.

It is an amenable number.

211220102021201 is a deficient number, since it is larger than the sum of its proper divisors (49378707364399).

211220102021201 is a wasteful number, since it uses less digits than its factorization.

211220102021201 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5675061608.

The product of its (nonzero) digits is 64, while the sum is 17.

Adding to 211220102021201 its reverse (102120201022112), we get a palindrome (313340303043313).

The spelling of 211220102021201 in words is "two hundred eleven trillion, two hundred twenty billion, one hundred two million, twenty-one thousand, two hundred one".