31212020100403 has 2 divisors, whose sum is σ = 31212020100404. Its totient is φ = 31212020100402.

The previous prime is 31212020100277. The next prime is 31212020100419. The reversal of 31212020100403 is 30400102021213.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 31212020100403 - 2³³ = 31203430165811 is a prime.

It is not a weakly prime, because it can be changed into another prime (31212020100463) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15606010050201 + 15606010050202.

It is an arithmetic number, because the mean of its divisors is an integer number (15606010050202).

Almost surely, 2^{31212020100403} is an apocalyptic number.

31212020100403 is a deficient number, since it is larger than the sum of its proper divisors (1).

31212020100403 is an equidigital number, since it uses as much as digits as its factorization.

31212020100403 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 288, while the sum is 19.

Adding to 31212020100403 its reverse (30400102021213), we get a palindrome (61612122121616).

The spelling of 31212020100403 in words is "thirty-one trillion, two hundred twelve billion, twenty million, one hundred thousand, four hundred three".