40312120122002 has 4 divisors (see below), whose sum is σ = 60468180183006. Its totient is φ = 20156060061000.

The previous prime is 40312120121971. The next prime is 40312120122007. The reversal of 40312120122002 is 20022102121304.

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

It can be written as a sum of positive squares in only one way, i.e., 27884937023161 + 12427183098841 = 5280619^2 + 3525221^2 .

It is not an unprimeable number, because it can be changed into a prime (40312120122007) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10078030030499 + ... + 10078030030502.

Almost surely, 2^{40312120122002} is an apocalyptic number.

40312120122002 is a deficient number, since it is larger than the sum of its proper divisors (20156060061004).

40312120122002 is a wasteful number, since it uses less digits than its factorization.

40312120122002 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20156060061003.

The product of its (nonzero) digits is 384, while the sum is 20.

Adding to 40312120122002 its reverse (20022102121304), we get a palindrome (60334222243306).

The spelling of 40312120122002 in words is "forty trillion, three hundred twelve billion, one hundred twenty million, one hundred twenty-two thousand, two".