211220220202 has 16 divisors (see below), whose sum is σ = 321214477320. Its totient is φ = 104149124352.

The previous prime is 211220220193. The next prime is 211220220203. The reversal of 211220220202 is 202022022112.

It can be written as a sum of positive squares in 4 ways, for example, as 124207609761 + 87012610441 = 352431^2 + 294979^2 .

It is a super-2 number, since 2×211220220202² (a number of 23 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (211220220203) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1012678 + ... + 1203310.

Almost surely, 2^211220220202 is an apocalyptic number.

211220220202 is a deficient number, since it is larger than the sum of its proper divisors (109994257118).

211220220202 is a wasteful number, since it uses less digits than its factorization.

211220220202 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 198297.

The product of its (nonzero) digits is 128, while the sum is 16.

Adding to 211220220202 its reverse (202022022112), we get a palindrome (413242242314).

The spelling of 211220220202 in words is "two hundred eleven billion, two hundred twenty million, two hundred twenty thousand, two hundred two".