1231212103200 has 108 divisors (see below), whose sum is σ = 4341561704298. Its totient is φ = 328323225600.

The previous prime is 1231212103189. The next prime is 1231212103201. The reversal of 1231212103200 is 23012121321.

1231212103200 is a `hidden beast` number, since 1 + 231 + 21 + 210 + 3 + 200 = 666.

It can be written as a sum of positive squares in 3 ways, for example, as 915642299664 + 315569803536 = 956892^2 + 561756^2 .

It is a Harshad number since it is a multiple of its sum of digits (18).

It is not an unprimeable number, because it can be changed into a prime (1231212103201) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 85493641 + ... + 85508040.

Almost surely, 2^{1231212103200} is an apocalyptic number.

1231212103200 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1231212103200 is an abundant number, since it is smaller than the sum of its proper divisors (3110349601098).

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

1231212103200 is a wasteful number, since it uses less digits than its factorization.

1231212103200 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 171001707 (or 171001691 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 18.

Adding to 1231212103200 its reverse (23012121321), we get a palindrome (1254224224521).

The spelling of 1231212103200 in words is "one trillion, two hundred thirty-one billion, two hundred twelve million, one hundred three thousand, two hundred".