1211731361300 has 72 divisors (see below), whose sum is σ = 2691004348032. Its totient is φ = 473350752000.

The previous prime is 1211731361293. The next prime is 1211731361387. The reversal of 1211731361300 is 31631371121.

It is a super-2 number, since 2×1211731361300² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 36623765 + ... + 36656835.

Almost surely, 2^{1211731361300} is an apocalyptic number.

1211731361300 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1211731361300, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1345502174016).

1211731361300 is an abundant number, since it is smaller than the sum of its proper divisors (1479272986732).

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

1211731361300 is a wasteful number, since it uses less digits than its factorization.

1211731361300 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41649 (or 41642 counting only the distinct ones).

The product of its (nonzero) digits is 2268, while the sum is 29.

The spelling of 1211731361300 in words is "one trillion, two hundred eleven billion, seven hundred thirty-one million, three hundred sixty-one thousand, three hundred".