211220201011 has 4 divisors (see below), whose sum is σ = 211287881224. Its totient is φ = 211152520800.

The previous prime is 211220200993. The next prime is 211220201033. The reversal of 211220201011 is 110102022112.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 211220201011 - 2¹³ = 211220192819 is a prime.

It is a super-2 number, since 2×211220201011² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 211220200982 and 211220201000.

It is not an unprimeable number, because it can be changed into a prime (211220201111) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 33835425 + ... + 33841666.

It is an arithmetic number, because the mean of its divisors is an integer number (52821970306).

Almost surely, 2^211220201011 is an apocalyptic number.

211220201011 is a deficient number, since it is larger than the sum of its proper divisors (67680213).

211220201011 is an equidigital number, since it uses as much as digits as its factorization.

211220201011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 67680212.

The product of its (nonzero) digits is 16, while the sum is 13.

Adding to 211220201011 its reverse (110102022112), we get a palindrome (321322223123).

The spelling of 211220201011 in words is "two hundred eleven billion, two hundred twenty million, two hundred one thousand, eleven".