2121403213144 has 48 divisors (see below), whose sum is σ = 4217600062800. Its totient is φ = 999146830080.

The previous prime is 2121403213141. The next prime is 2121403213147. The reversal of 2121403213144 is 4413123041212.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (2121403213141) and next prime (2121403213147).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2121403213141) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2329812 + ... + 3109795.

It is an arithmetic number, because the mean of its divisors is an integer number (87866667975).

Almost surely, 2^{2121403213144} is an apocalyptic number.

It is an amenable number.

2121403213144 is a deficient number, since it is larger than the sum of its proper divisors (2096196849656).

2121403213144 is a wasteful number, since it uses less digits than its factorization.

2121403213144 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5439724 (or 5439679 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 28.

Adding to 2121403213144 its reverse (4413123041212), we get a palindrome (6534526254356).

The spelling of 2121403213144 in words is "two trillion, one hundred twenty-one billion, four hundred three million, two hundred thirteen thousand, one hundred forty-four".