1212431012164 has 24 divisors (see below), whose sum is σ = 2124028712960. Its totient is φ = 605565945504.

The previous prime is 1212431012161. The next prime is 1212431012167. The reversal of 1212431012164 is 4612101342121.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (1212431012161) and next prime (1212431012167).

It is not an unprimeable number, because it can be changed into a prime (1212431012161) 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, 18605062 + ... + 18670114.

Almost surely, 2^{1212431012164} is an apocalyptic number.

It is an amenable number.

1212431012164 is a deficient number, since it is larger than the sum of its proper divisors (911597700796).

1212431012164 is a wasteful number, since it uses less digits than its factorization.

1212431012164 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 69979 (or 69977 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 28.

Adding to 1212431012164 its reverse (4612101342121), we get a palindrome (5824532354285).

The spelling of 1212431012164 in words is "one trillion, two hundred twelve billion, four hundred thirty-one million, twelve thousand, one hundred sixty-four".