2134344021421 has 2 divisors, whose sum is σ = 2134344021422. Its totient is φ = 2134344021420.

The previous prime is 2134344021413. The next prime is 2134344021451. The reversal of 2134344021421 is 1241204434312.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2130169440100 + 4174581321 = 1459510^2 + 64611^2 .

It is a cyclic number.

It is not a de Polignac number, because 2134344021421 - 2³ = 2134344021413 is a prime.

It is a super-2 number, since 2×2134344021421² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2134344021451) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1067172010710 + 1067172010711.

It is an arithmetic number, because the mean of its divisors is an integer number (1067172010711).

Almost surely, 2^{2134344021421} is an apocalyptic number.

It is an amenable number.

2134344021421 is a deficient number, since it is larger than the sum of its proper divisors (1).

2134344021421 is an equidigital number, since it uses as much as digits as its factorization.

2134344021421 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 18432, while the sum is 31.

Adding to 2134344021421 its reverse (1241204434312), we get a palindrome (3375548455733).

The spelling of 2134344021421 in words is "two trillion, one hundred thirty-four billion, three hundred forty-four million, twenty-one thousand, four hundred twenty-one".