2121231013013 has 48 divisors (see below), whose sum is σ = 2663313016320. Its totient is φ = 1678975016544.

The previous prime is 2121231013009. The next prime is 2121231013019. The reversal of 2121231013013 is 3103101321212.

It is a happy number.

It is not a de Polignac number, because 2121231013013 - 2² = 2121231013009 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2121231013019) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 19441670 + ... + 19550472.

It is an arithmetic number, because the mean of its divisors is an integer number (55485687840).

Almost surely, 2^{2121231013013} is an apocalyptic number.

It is an amenable number.

2121231013013 is a deficient number, since it is larger than the sum of its proper divisors (542082003307).

2121231013013 is a wasteful number, since it uses less digits than its factorization.

2121231013013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 109366 (or 109359 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 20.

Adding to 2121231013013 its reverse (3103101321212), we get a palindrome (5224332334225).

The spelling of 2121231013013 in words is "two trillion, one hundred twenty-one billion, two hundred thirty-one million, thirteen thousand, thirteen".