31212002011 has 8 divisors (see below), whose sum is σ = 31600880640. Its totient is φ = 30823429032.

The previous prime is 31212001987. The next prime is 31212002021. The reversal of 31212002011 is 11020021213.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 31212002011 - 2⁵ = 31212001979 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 31212001982 and 31212002000.

It is not an unprimeable number, because it can be changed into a prime (31212002021) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 132630 + ... + 282868.

It is an arithmetic number, because the mean of its divisors is an integer number (3950110080).

Almost surely, 2^31212002011 is an apocalyptic number.

31212002011 is a deficient number, since it is larger than the sum of its proper divisors (388878629).

31212002011 is a wasteful number, since it uses less digits than its factorization.

31212002011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 152825.

The product of its (nonzero) digits is 24, while the sum is 13.

Adding to 31212002011 its reverse (11020021213), we get a palindrome (42232023224).

The spelling of 31212002011 in words is "thirty-one billion, two hundred twelve million, two thousand, eleven".