2121354535401 has 24 divisors (see below), whose sum is σ = 3198308008896. Its totient is φ = 1352365328160.

The previous prime is 2121354535379. The next prime is 2121354535427. The reversal of 2121354535401 is 1045354531212.

2121354535401 is a `hidden beast` number, since 2 + 1 + 2 + 13 + 54 + 53 + 540 + 1 = 666.

It is not a de Polignac number, because 2121354535401 - 2⁵ = 2121354535369 is a prime.

It is not an unprimeable number, because it can be changed into a prime (2121354530401) 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, 714075 + ... + 2180048.

It is an arithmetic number, because the mean of its divisors is an integer number (133262833704).

Almost surely, 2^{2121354535401} is an apocalyptic number.

It is an amenable number.

2121354535401 is a deficient number, since it is larger than the sum of its proper divisors (1076953473495).

2121354535401 is a wasteful number, since it uses less digits than its factorization.

2121354535401 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2897693 (or 2897690 counting only the distinct ones).

The product of its (nonzero) digits is 72000, while the sum is 36.

The spelling of 2121354535401 in words is "two trillion, one hundred twenty-one billion, three hundred fifty-four million, five hundred thirty-five thousand, four hundred one".