1212141157 has 8 divisors (see below), whose sum is σ = 1350993600. Its totient is φ = 1080794304.

The previous prime is 1212141143. The next prime is 1212141163. The reversal of 1212141157 is 7511412121.

It is a happy number.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1212141157 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 (1212141257) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1876057 + ... + 1876702.

It is an arithmetic number, because the mean of its divisors is an integer number (168874200).

Almost surely, 2^1212141157 is an apocalyptic number.

1212141157 is a gapful number since it is divisible by the number (17) formed by its first and last digit.

It is an amenable number.

1212141157 is a deficient number, since it is larger than the sum of its proper divisors (138852443).

1212141157 is a wasteful number, since it uses less digits than its factorization.

1212141157 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3752795.

The product of its digits is 560, while the sum is 25.

The square root of 1212141157 is about 34815.8176264755. The cubic root of 1212141157 is about 1066.2304123023.

Adding to 1212141157 its reverse (7511412121), we get a palindrome (8723553278).

The spelling of 1212141157 in words is "one billion, two hundred twelve million, one hundred forty-one thousand, one hundred fifty-seven".