312121331101 has 8 divisors (see below), whose sum is σ = 336189439520. Its totient is φ = 288817289712.

The previous prime is 312121331099. The next prime is 312121331141. The reversal of 312121331101 is 101133121213.

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 312121331101 - 2¹ = 312121331099 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (19).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (312121331141) 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, 191015910 + ... + 191017543.

It is an arithmetic number, because the mean of its divisors is an integer number (42023679940).

Almost surely, 2^312121331101 is an apocalyptic number.

It is an amenable number.

312121331101 is a deficient number, since it is larger than the sum of its proper divisors (24068108419).

312121331101 is a wasteful number, since it uses less digits than its factorization.

312121331101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 382033515.

The product of its (nonzero) digits is 108, while the sum is 19.

Adding to 312121331101 its reverse (101133121213), we get a palindrome (413254452314).

The spelling of 312121331101 in words is "three hundred twelve billion, one hundred twenty-one million, three hundred thirty-one thousand, one hundred one".