101211234431 has 4 divisors (see below), whose sum is σ = 101215989072. Its totient is φ = 101206479792.

The previous prime is 101211234359. The next prime is 101211234457. The reversal of 101211234431 is 134432112101.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 134432112101 = 7 ⋅19204587443.

It is a cyclic number.

It is not a de Polignac number, because 101211234431 - 2³⁴ = 84031365247 is a prime.

It is a super-2 number, since 2×101211234431² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 101211234397 and 101211234406.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (101211234931) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2345246 + ... + 2388011.

It is an arithmetic number, because the mean of its divisors is an integer number (25303997268).

Almost surely, 2^101211234431 is an apocalyptic number.

101211234431 is a deficient number, since it is larger than the sum of its proper divisors (4754641).

101211234431 is an equidigital number, since it uses as much as digits as its factorization.

101211234431 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4754640.

The product of its (nonzero) digits is 576, while the sum is 23.

Adding to 101211234431 its reverse (134432112101), we get a palindrome (235643346532).

The spelling of 101211234431 in words is "one hundred one billion, two hundred eleven million, two hundred thirty-four thousand, four hundred thirty-one".