1212211101 has 8 divisors (see below), whose sum is σ = 1640405344. Its totient is φ = 796078800.

The previous prime is 1212211097. The next prime is 1212211103. The reversal of 1212211101 is 1011122121.

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

It is not a de Polignac number, because 1212211101 - 2² = 1212211097 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1212211103) 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, 3015250 + ... + 3015651.

It is an arithmetic number, because the mean of its divisors is an integer number (205050668).

Almost surely, 2^1212211101 is an apocalyptic number.

It is an amenable number.

1212211101 is a deficient number, since it is larger than the sum of its proper divisors (428194243).

1212211101 is an equidigital number, since it uses as much as digits as its factorization.

1212211101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6030971.

The product of its (nonzero) digits is 8, while the sum is 12.

The square root of 1212211101 is about 34816.8220979457. The cubic root of 1212211101 is about 1066.2509200859.

Adding to 1212211101 its reverse (1011122121), we get a palindrome (2223333222).

The spelling of 1212211101 in words is "one billion, two hundred twelve million, two hundred eleven thousand, one hundred one".