61231111141212 has 24 divisors (see below), whose sum is σ = 158747325181200. Its totient is φ = 20410370380368.

The previous prime is 61231111141201. The next prime is 61231111141223. The reversal of 61231111141212 is 21214111113216.

61231111141212 is a `hidden beast` number, since 6 + 1 + 231 + 1 + 1 + 1 + 1 + 412 + 12 = 666.

It is an interprime number because it is at equal distance from previous prime (61231111141201) and next prime (61231111141223).

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a nude number because it is divisible by every one of its digits.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 283477366287 + ... + 283477366502.

It is an arithmetic number, because the mean of its divisors is an integer number (6614471882550).

Almost surely, 2^{61231111141212} is an apocalyptic number.

It is an amenable number.

61231111141212 is an abundant number, since it is smaller than the sum of its proper divisors (97516214039988).

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

61231111141212 is a wasteful number, since it uses less digits than its factorization.

61231111141212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 566954732802 (or 566954732794 counting only the distinct ones).

The product of its digits is 576, while the sum is 27.

Adding to 61231111141212 its reverse (21214111113216), we get a palindrome (82445222254428).

The spelling of 61231111141212 in words is "sixty-one trillion, two hundred thirty-one billion, one hundred eleven million, one hundred forty-one thousand, two hundred twelve".