31001220101 has 8 divisors (see below), whose sum is σ = 31742440224. Its totient is φ = 30260921040.

The previous prime is 31001220091. The next prime is 31001220109. The reversal of 31001220101 is 10102210013.

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 31001220101 - 2³⁰ = 29927478277 is a prime.

It is a super-2 number, since 2×31001220101² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31001220109) 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, 161906 + ... + 297011.

It is an arithmetic number, because the mean of its divisors is an integer number (3967805028).

Almost surely, 2^31001220101 is an apocalyptic number.

It is an amenable number.

31001220101 is a deficient number, since it is larger than the sum of its proper divisors (741220123).

31001220101 is a wasteful number, since it uses less digits than its factorization.

31001220101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 460531.

The product of its (nonzero) digits is 12, while the sum is 11.

Adding to 31001220101 its reverse (10102210013), we get a palindrome (41103430114).

The spelling of 31001220101 in words is "thirty-one billion, one million, two hundred twenty thousand, one hundred one".