2121433550542 has 4 divisors (see below), whose sum is σ = 3182150325816. Its totient is φ = 1060716775270.

The previous prime is 2121433550503. The next prime is 2121433550591. The reversal of 2121433550542 is 2450553341212.

It is a happy number.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 530358387634 + ... + 530358387637.

It is an arithmetic number, because the mean of its divisors is an integer number (795537581454).

Almost surely, 2^{2121433550542} is an apocalyptic number.

2121433550542 is a deficient number, since it is larger than the sum of its proper divisors (1060716775274).

2121433550542 is a wasteful number, since it uses less digits than its factorization.

2121433550542 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1060716775273.

The product of its (nonzero) digits is 144000, while the sum is 37.

Adding to 2121433550542 its reverse (2450553341212), we get a palindrome (4571986891754).

The spelling of 2121433550542 in words is "two trillion, one hundred twenty-one billion, four hundred thirty-three million, five hundred fifty thousand, five hundred forty-two".