1220000211 has 12 divisors (see below), whose sum is σ = 1827490392. Its totient is φ = 813333312.

The previous prime is 1220000191. The next prime is 1220000231. The reversal of 1220000211 is 1120000221.

It is an interprime number because it is at equal distance from previous prime (1220000191) and next prime (1220000231).

It is not a de Polignac number, because 1220000211 - 2¹⁸ = 1219738067 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (9).

It is a junction number, because it is equal to n+sod(n) for n = 1220000193 and 1220000202.

It is not an unprimeable number, because it can be changed into a prime (1220000231) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2510046 + ... + 2510531.

It is an arithmetic number, because the mean of its divisors is an integer number (152290866).

Almost surely, 2^1220000211 is an apocalyptic number.

1220000211 is a deficient number, since it is larger than the sum of its proper divisors (607490181).

1220000211 is an frugal number, since it uses more digits than its factorization.

1220000211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5020592 (or 5020580 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 9.

The square root of 1220000211 is about 34928.5014136020. The cubic root of 1220000211 is about 1068.5297917499.

Adding to 1220000211 its reverse (1120000221), we get a palindrome (2340000432).

The spelling of 1220000211 in words is "one billion, two hundred twenty million, two hundred eleven", and thus it is an aban number.