1213408228923 has 36 divisors (see below), whose sum is σ = 1975705616664. Its totient is φ = 711676324800.

The previous prime is 1213408228849. The next prime is 1213408228933. The reversal of 1213408228923 is 3298228043121.

1213408228923 is a `hidden beast` number, since 1 + 2 + 1 + 340 + 8 + 2 + 289 + 23 = 666.

It is not a de Polignac number, because 1213408228923 - 2¹² = 1213408224827 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1213408228933) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 6281890 + ... + 6472167.

It is an arithmetic number, because the mean of its divisors is an integer number (54880711574).

Almost surely, 2^{1213408228923} is an apocalyptic number.

1213408228923 is a deficient number, since it is larger than the sum of its proper divisors (762297387741).

1213408228923 is a wasteful number, since it uses less digits than its factorization.

1213408228923 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12754136 (or 12754102 counting only the distinct ones).

The product of its (nonzero) digits is 331776, while the sum is 45.

The spelling of 1213408228923 in words is "one trillion, two hundred thirteen billion, four hundred eight million, two hundred twenty-eight thousand, nine hundred twenty-three".