31101212201 has 8 divisors (see below), whose sum is σ = 31388031624. Its totient is φ = 30815516160.

The previous prime is 31101212183. The next prime is 31101212203. The reversal of 31101212201 is 10221210113.

It can be written as a sum of positive squares in 4 ways, for example, as 6740245801 + 24360966400 = 82099^2 + 156080^2 .

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-31101212201 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (31101212203) 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, 225170 + ... + 336011.

It is an arithmetic number, because the mean of its divisors is an integer number (3923503953).

Almost surely, 2^31101212201 is an apocalyptic number.

It is an amenable number.

31101212201 is a deficient number, since it is larger than the sum of its proper divisors (286819423).

31101212201 is a wasteful number, since it uses less digits than its factorization.

31101212201 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 561691.

The product of its (nonzero) digits is 24, while the sum is 14.

Adding to 31101212201 its reverse (10221210113), we get a palindrome (41322422314).

The spelling of 31101212201 in words is "thirty-one billion, one hundred one million, two hundred twelve thousand, two hundred one".