1211032101 has 4 divisors (see below), whose sum is σ = 1614709472. Its totient is φ = 807354732.

The previous prime is 1211032093. The next prime is 1211032103. The reversal of 1211032101 is 1012301121.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 1211032101 - 2³ = 1211032093 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 (1211032103) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 201838681 + ... + 201838686.

It is an arithmetic number, because the mean of its divisors is an integer number (403677368).

Almost surely, 2^1211032101 is an apocalyptic number.

It is an amenable number.

1211032101 is a deficient number, since it is larger than the sum of its proper divisors (403677371).

1211032101 is an equidigital number, since it uses as much as digits as its factorization.

1211032101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 403677370.

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

The square root of 1211032101 is about 34799.8865084356. The cubic root of 1211032101 is about 1065.9051283861.

Adding to 1211032101 its reverse (1012301121), we get a palindrome (2223333222).

The spelling of 1211032101 in words is "one billion, two hundred eleven million, thirty-two thousand, one hundred one".