1212420211 has 16 divisors (see below), whose sum is σ = 1249318080. Its totient is φ = 1176215040.

The previous prime is 1212420203. The next prime is 1212420227. The reversal of 1212420211 is 1120242121.

It is a cyclic number.

It is not a de Polignac number, because 1212420211 - 2³ = 1212420203 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1212420241) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1977541 + ... + 1978153.

It is an arithmetic number, because the mean of its divisors is an integer number (78082380).

Almost surely, 2^1212420211 is an apocalyptic number.

1212420211 is a deficient number, since it is larger than the sum of its proper divisors (36897869).

1212420211 is an equidigital number, since it uses as much as digits as its factorization.

1212420211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1086.

The product of its (nonzero) digits is 64, while the sum is 16.

The square root of 1212420211 is about 34819.8249708410. The cubic root of 1212420211 is about 1066.3122270398.

Adding to 1212420211 its reverse (1120242121), we get a palindrome (2332662332).

The spelling of 1212420211 in words is "one billion, two hundred twelve million, four hundred twenty thousand, two hundred eleven".