1229975400123 has 72 divisors (see below), whose sum is σ = 1895486746608. Its totient is φ = 797032029600.

The previous prime is 1229975400119. The next prime is 1229975400127. The reversal of 1229975400123 is 3210045799221.

It is a powerful number, because all its prime factors have an exponent greater than 1 and also an Achilles number because it is not a perfect power.

1229975400123 is a `hidden beast` number, since 1 + 2 + 2 + 9 + 97 + 540 + 0 + 12 + 3 = 666.

It is an interprime number because it is at equal distance from previous prime (1229975400119) and next prime (1229975400127).

It is not a de Polignac number, because 1229975400123 - 2² = 1229975400119 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1229975400127) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 4538654478 + ... + 4538654748.

It is an arithmetic number, because the mean of its divisors is an integer number (26326204814).

Almost surely, 2^{1229975400123} is an apocalyptic number.

1229975400123 is a deficient number, since it is larger than the sum of its proper divisors (665511346485).

1229975400123 is an frugal number, since it uses more digits than its factorization.

1229975400123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 680 (or 315 counting only the distinct ones).

The product of its (nonzero) digits is 272160, while the sum is 45.

The spelling of 1229975400123 in words is "one trillion, two hundred twenty-nine billion, nine hundred seventy-five million, four hundred thousand, one hundred twenty-three".