1220201211 has 8 divisors (see below), whose sum is σ = 1636916800. Its totient is φ = 808476552.

The previous prime is 1220201189. The next prime is 1220201249. The reversal of 1220201211 is 1121020221.

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

It is not a de Polignac number, because 1220201211 - 2⁵ = 1220201179 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1220201251) 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, 1247161 + ... + 1248138.

It is an arithmetic number, because the mean of its divisors is an integer number (204614600).

Almost surely, 2^1220201211 is an apocalyptic number.

1220201211 is a deficient number, since it is larger than the sum of its proper divisors (416715589).

1220201211 is a wasteful number, since it uses less digits than its factorization.

1220201211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2495465.

The product of its (nonzero) digits is 16, while the sum is 12.

The square root of 1220201211 is about 34931.3786014809. The cubic root of 1220201211 is about 1068.5884700715.

Adding to 1220201211 its reverse (1121020221), we get a palindrome (2341221432).

The spelling of 1220201211 in words is "one billion, two hundred twenty million, two hundred one thousand, two hundred eleven".