131211211221240 has 64 divisors (see below), whose sum is σ = 394150892326560. Its totient is φ = 34943677777920.

The previous prime is 131211211221229. The next prime is 131211211221253. The reversal of 131211211221240 is 42122112112131.

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

It is a self number, because there is not a number n which added to its sum of digits gives 131211211221240.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 718323109 + ... + 718505748.

Almost surely, 2^{131211211221240} is an apocalyptic number.

131211211221240 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

131211211221240 is an abundant number, since it is smaller than the sum of its proper divisors (262939681105320).

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

131211211221240 is a wasteful number, since it uses less digits than its factorization.

131211211221240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1436829632 (or 1436829628 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 24.

Adding to 131211211221240 its reverse (42122112112131), we get a palindrome (173333323333371).

The spelling of 131211211221240 in words is "one hundred thirty-one trillion, two hundred eleven billion, two hundred eleven million, two hundred twenty-one thousand, two hundred forty".