2131243421204 has 12 divisors (see below), whose sum is σ = 3730167368928. Its totient is φ = 1065481315800.

The previous prime is 2131243421191. The next prime is 2131243421221. The reversal of 2131243421204 is 4021243421312.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 35064542 + ... + 35125269.

It is an arithmetic number, because the mean of its divisors is an integer number (310847280744).

Almost surely, 2^{2131243421204} is an apocalyptic number.

It is an amenable number.

2131243421204 is a deficient number, since it is larger than the sum of its proper divisors (1598923947724).

2131243421204 is a wasteful number, since it uses less digits than its factorization.

2131243421204 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 70197406 (or 70197404 counting only the distinct ones).

The product of its (nonzero) digits is 9216, while the sum is 29.

Adding to 2131243421204 its reverse (4021243421312), we get a palindrome (6152486842516).

The spelling of 2131243421204 in words is "two trillion, one hundred thirty-one billion, two hundred forty-three million, four hundred twenty-one thousand, two hundred four".