1213124420400 has 60 divisors (see below), whose sum is σ = 3886041897192. Its totient is φ = 323499845120.

The previous prime is 1213124420393. The next prime is 1213124420461. The reversal of 1213124420400 is 40244213121.

It is a tau number, because it is divible by the number of its divisors (60).

It is a Harshad number since it is a multiple of its sum of digits (24).

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 505467309 + ... + 505469708.

Almost surely, 2^{1213124420400} is an apocalyptic number.

1213124420400 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1213124420400 is an abundant number, since it is smaller than the sum of its proper divisors (2672917476792).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1213124420400 is a wasteful number, since it uses less digits than its factorization.

1213124420400 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1010937038 (or 1010937027 counting only the distinct ones).

The product of its (nonzero) digits is 1536, while the sum is 24.

Adding to 1213124420400 its reverse (40244213121), we get a palindrome (1253368633521).

The spelling of 1213124420400 in words is "one trillion, two hundred thirteen billion, one hundred twenty-four million, four hundred twenty thousand, four hundred".