31212101203 has 2 divisors, whose sum is σ = 31212101204. Its totient is φ = 31212101202.

The previous prime is 31212101197. The next prime is 31212101213. The reversal of 31212101203 is 30210121213.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-31212101203 is a prime.

It is not a weakly prime, because it can be changed into another prime (31212101213) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15606050601 + 15606050602.

It is an arithmetic number, because the mean of its divisors is an integer number (15606050602).

Almost surely, 2^31212101203 is an apocalyptic number.

31212101203 is a deficient number, since it is larger than the sum of its proper divisors (1).

31212101203 is an equidigital number, since it uses as much as digits as its factorization.

31212101203 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 72, while the sum is 16.

Adding to 31212101203 its reverse (30210121213), we get a palindrome (61422222416).

The spelling of 31212101203 in words is "thirty-one billion, two hundred twelve million, one hundred one thousand, two hundred three".