211220203113 has 24 divisors (see below), whose sum is σ = 306279262848. Its totient is φ = 140267922912.

The previous prime is 211220203079. The next prime is 211220203147. The reversal of 211220203113 is 311302022112.

It is an interprime number because it is at equal distance from previous prime (211220203079) and next prime (211220203147).

It is not a de Polignac number, because 211220203113 - 2¹³ = 211220194921 is a prime.

It is a super-2 number, since 2×211220203113² (a number of 23 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (211220203013) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 4033806 + ... + 4085832.

It is an arithmetic number, because the mean of its divisors is an integer number (12761635952).

Almost surely, 2^211220203113 is an apocalyptic number.

It is an amenable number.

211220203113 is a deficient number, since it is larger than the sum of its proper divisors (95059059735).

211220203113 is a wasteful number, since it uses less digits than its factorization.

211220203113 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 53773 (or 53770 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 18.

Adding to 211220203113 its reverse (311302022112), we get a palindrome (522522225225).

The spelling of 211220203113 in words is "two hundred eleven billion, two hundred twenty million, two hundred three thousand, one hundred thirteen".