1213178141 has 16 divisors (see below), whose sum is σ = 1436883840. Its totient is φ = 1002200640.

The previous prime is 1213178117. The next prime is 1213178143. The reversal of 1213178141 is 1418713121.

It is not a de Polignac number, because 1213178141 - 2⁶ = 1213178077 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (29).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1213178143) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 114071 + ... + 124251.

It is an arithmetic number, because the mean of its divisors is an integer number (89805240).

Almost surely, 2^1213178141 is an apocalyptic number.

It is an amenable number.

1213178141 is a deficient number, since it is larger than the sum of its proper divisors (223705699).

1213178141 is a wasteful number, since it uses less digits than its factorization.

1213178141 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10804.

The product of its digits is 1344, while the sum is 29.

The square root of 1213178141 is about 34830.7068690832. The cubic root of 1213178141 is about 1066.5343782014.

The spelling of 1213178141 in words is "one billion, two hundred thirteen million, one hundred seventy-eight thousand, one hundred forty-one".