1213043151 has 4 divisors (see below), whose sum is σ = 1617390872. Its totient is φ = 808695432.

The previous prime is 1213043149. The next prime is 1213043189. The reversal of 1213043151 is 1513403121.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 1213043151 - 2¹ = 1213043149 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 (1213043141) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 202173856 + ... + 202173861.

It is an arithmetic number, because the mean of its divisors is an integer number (404347718).

Almost surely, 2^1213043151 is an apocalyptic number.

1213043151 is a deficient number, since it is larger than the sum of its proper divisors (404347721).

1213043151 is an equidigital number, since it uses as much as digits as its factorization.

1213043151 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 404347720.

The product of its (nonzero) digits is 360, while the sum is 21.

The square root of 1213043151 is about 34828.7690135612. The cubic root of 1213043151 is about 1066.4948190713.

Adding to 1213043151 its reverse (1513403121), we get a palindrome (2726446272).

The spelling of 1213043151 in words is "one billion, two hundred thirteen million, forty-three thousand, one hundred fifty-one".