312212121001 has 8 divisors (see below), whose sum is σ = 345678549984. Its totient is φ = 279592943520.

The previous prime is 312212120999. The next prime is 312212121029. The reversal of 312212121001 is 100121212213.

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

It is not a de Polignac number, because 312212121001 - 2¹ = 312212120999 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (312212121041) 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, 211812100 + ... + 211813573.

It is an arithmetic number, because the mean of its divisors is an integer number (43209818748).

Almost surely, 2^312212121001 is an apocalyptic number.

It is an amenable number.

312212121001 is a deficient number, since it is larger than the sum of its proper divisors (33466428983).

312212121001 is a wasteful number, since it uses less digits than its factorization.

312212121001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 423625751.

The product of its (nonzero) digits is 48, while the sum is 16.

Adding to 312212121001 its reverse (100121212213), we get a palindrome (412333333214).

It can be divided in two parts, 31221212 and 1001, that added together give a palindrome (31222213).

The spelling of 312212121001 in words is "three hundred twelve billion, two hundred twelve million, one hundred twenty-one thousand, one".