3121001222 has 4 divisors (see below), whose sum is σ = 4681501836. Its totient is φ = 1560500610.

The previous prime is 3121001209. The next prime is 3121001227. The reversal of 3121001222 is 2221001213.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a junction number, because it is equal to n+sod(n) for n = 3121001197 and 3121001206.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3121001227) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 780250304 + ... + 780250307.

It is an arithmetic number, because the mean of its divisors is an integer number (1170375459).

Almost surely, 2^3121001222 is an apocalyptic number.

3121001222 is a deficient number, since it is larger than the sum of its proper divisors (1560500614).

3121001222 is a wasteful number, since it uses less digits than its factorization.

3121001222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1560500613.

The product of its (nonzero) digits is 48, while the sum is 14.

The square root of 3121001222 is about 55865.9218307547. The cubic root of 3121001222 is about 1461.3850030463.

Adding to 3121001222 its reverse (2221001213), we get a palindrome (5342002435).

Subtracting from 3121001222 its reverse (2221001213), we obtain a palindrome (900000009).

The spelling of 3121001222 in words is "three billion, one hundred twenty-one million, one thousand, two hundred twenty-two".