31212020100003 has 16 divisors (see below), whose sum is σ = 41733095788800. Its totient is φ = 20749504771040.

The previous prime is 31212020099983. The next prime is 31212020100011. The reversal of 31212020100003 is 30000102021213.

It is a cyclic number.

It is not a de Polignac number, because 31212020100003 - 2⁸ = 31212020099747 is a prime.

It is not an unprimeable number, because it can be changed into a prime (31212020100403) 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, 1599298 + ... + 8061128.

It is an arithmetic number, because the mean of its divisors is an integer number (2608318486800).

Almost surely, 2^{31212020100003} is an apocalyptic number.

31212020100003 is a deficient number, since it is larger than the sum of its proper divisors (10521075688797).

31212020100003 is a wasteful number, since it uses less digits than its factorization.

31212020100003 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6466362.

The product of its (nonzero) digits is 72, while the sum is 15.

Adding to 31212020100003 its reverse (30000102021213), we get a palindrome (61212122121216).

The spelling of 31212020100003 in words is "thirty-one trillion, two hundred twelve billion, twenty million, one hundred thousand, three".