2742121516421 has 24 divisors (see below), whose sum is σ = 3276300862464. Its totient is φ = 2248014336480.

The previous prime is 2742121516399. The next prime is 2742121516427. The reversal of 2742121516421 is 1246151212472.

2742121516421 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 2742121516421 - 2¹⁸ = 2742121254277 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2742121516427) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 62303195 + ... + 62347191.

It is an arithmetic number, because the mean of its divisors is an integer number (136512535936).

Almost surely, 2^{2742121516421} is an apocalyptic number.

It is an amenable number.

2742121516421 is a deficient number, since it is larger than the sum of its proper divisors (534179346043).

2742121516421 is a wasteful number, since it uses less digits than its factorization.

2742121516421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 60881 (or 60858 counting only the distinct ones).

The product of its digits is 53760, while the sum is 38.

Adding to 2742121516421 its reverse (1246151212472), we get a palindrome (3988272728893).

The spelling of 2742121516421 in words is "two trillion, seven hundred forty-two billion, one hundred twenty-one million, five hundred sixteen thousand, four hundred twenty-one".