2135200021451 has 16 divisors (see below), whose sum is σ = 2455450752000. Its totient is φ = 1818777030048.

The previous prime is 2135200021411. The next prime is 2135200021459. The reversal of 2135200021451 is 1541200025312.

It is a cyclic number.

It is not a de Polignac number, because 2135200021451 - 2²² = 2135195827147 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 2135200021451.

It is not an unprimeable number, because it can be changed into a prime (2135200021459) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 230306 + ... + 2079288.

It is an arithmetic number, because the mean of its divisors is an integer number (153465672000).

Almost surely, 2^{2135200021451} is an apocalyptic number.

2135200021451 is a deficient number, since it is larger than the sum of its proper divisors (320250730549).

2135200021451 is a wasteful number, since it uses less digits than its factorization.

2135200021451 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1850018.

The product of its (nonzero) digits is 2400, while the sum is 26.

Adding to 2135200021451 its reverse (1541200025312), we get a palindrome (3676400046763).

The spelling of 2135200021451 in words is "two trillion, one hundred thirty-five billion, two hundred million, twenty-one thousand, four hundred fifty-one".