243121245146 has 16 divisors (see below), whose sum is σ = 393575311584. Its totient is φ = 111969521904.

The previous prime is 243121245109. The next prime is 243121245181. The reversal of 243121245146 is 641542121342.

It is a happy number.

It is a super-2 number, since 2×243121245146² (a number of 24 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9999440 + ... + 10023723.

It is an arithmetic number, because the mean of its divisors is an integer number (24598456974).

Almost surely, 2^243121245146 is an apocalyptic number.

243121245146 is a gapful number since it is divisible by the number (26) formed by its first and last digit.

243121245146 is a deficient number, since it is larger than the sum of its proper divisors (150454066438).

243121245146 is a wasteful number, since it uses less digits than its factorization.

243121245146 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20023645.

The product of its digits is 46080, while the sum is 35.

Adding to 243121245146 its reverse (641542121342), we get a palindrome (884663366488).

The spelling of 243121245146 in words is "two hundred forty-three billion, one hundred twenty-one million, two hundred forty-five thousand, one hundred forty-six".