20121002122004 has 24 divisors (see below), whose sum is σ = 40242394610880. Its totient is φ = 8623202973696.

The previous prime is 20121002122003. The next prime is 20121002122007. The reversal of 20121002122004 is 40022120012102.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20121002122003) 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, 502637 + ... + 6363540.

It is an arithmetic number, because the mean of its divisors is an integer number (1676766442120).

Almost surely, 2^{20121002122004} is an apocalyptic number.

It is an amenable number.

20121002122004 is an abundant number, since it is smaller than the sum of its proper divisors (20121392488876).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20121002122004 is a wasteful number, since it uses less digits than its factorization.

20121002122004 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6970847 (or 6970845 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 17.

Adding to 20121002122004 its reverse (40022120012102), we get a palindrome (60143122134106).

The spelling of 20121002122004 in words is "twenty trillion, one hundred twenty-one billion, two million, one hundred twenty-two thousand, four".