2135420420501 has 4 divisors (see below), whose sum is σ = 2135424826272. Its totient is φ = 2135416014732.

The previous prime is 2135420420467. The next prime is 2135420420527. The reversal of 2135420420501 is 1050240245312.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 2135420420501 - 2¹⁰ = 2135420419477 is a prime.

It is a super-2 number, since 2×2135420420501² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2135420420561) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1371185 + ... + 2480118.

It is an arithmetic number, because the mean of its divisors is an integer number (533856206568).

Almost surely, 2^{2135420420501} is an apocalyptic number.

It is an amenable number.

2135420420501 is a deficient number, since it is larger than the sum of its proper divisors (4405771).

2135420420501 is an equidigital number, since it uses as much as digits as its factorization.

2135420420501 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4405770.

The product of its (nonzero) digits is 9600, while the sum is 29.

Adding to 2135420420501 its reverse (1050240245312), we get a palindrome (3185660665813).

The spelling of 2135420420501 in words is "two trillion, one hundred thirty-five billion, four hundred twenty million, four hundred twenty thousand, five hundred one".