31212144201 has 16 divisors (see below), whose sum is σ = 47563862400. Its totient is φ = 17834573568.

The previous prime is 31212144101. The next prime is 31212144203. The reversal of 31212144201 is 10244121213.

It is not a de Polignac number, because 31212144201 - 2⁹ = 31212143689 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is not an unprimeable number, because it can be changed into a prime (31212144203) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 665905 + ... + 711233.

It is an arithmetic number, because the mean of its divisors is an integer number (2972741400).

Almost surely, 2^31212144201 is an apocalyptic number.

It is an amenable number.

31212144201 is a deficient number, since it is larger than the sum of its proper divisors (16351718199).

31212144201 is a wasteful number, since it uses less digits than its factorization.

31212144201 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 78128.

The product of its (nonzero) digits is 384, while the sum is 21.

Adding to 31212144201 its reverse (10244121213), we get a palindrome (41456265414).

The spelling of 31212144201 in words is "thirty-one billion, two hundred twelve million, one hundred forty-four thousand, two hundred one".