1211102747640 has 128 divisors (see below), whose sum is σ = 4064103720000. Its totient is φ = 320793168384.

The previous prime is 1211102747629. The next prime is 1211102747653. The reversal of 1211102747640 is 467472011121.

1211102747640 is a `hidden beast` number, since 1 + 2 + 1 + 1 + 1 + 0 + 2 + 7 + 4 + 7 + 640 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 1211102747595 and 1211102747604.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 3602139 + ... + 3923978.

Almost surely, 2^{1211102747640} is an apocalyptic number.

1211102747640 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1211102747640 is an abundant number, since it is smaller than the sum of its proper divisors (2853000972360).

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

1211102747640 is a wasteful number, since it uses less digits than its factorization.

1211102747640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7526286 (or 7526276 counting only the distinct ones).

The product of its (nonzero) digits is 18816, while the sum is 36.

Adding to 1211102747640 its reverse (467472011121), we get a palindrome (1678574758761).

The spelling of 1211102747640 in words is "one trillion, two hundred eleven billion, one hundred two million, seven hundred forty-seven thousand, six hundred forty".