2151200235421 has 8 divisors (see below), whose sum is σ = 2162868485120. Its totient is φ = 2139550036272.

The previous prime is 2151200235419. The next prime is 2151200235449. The reversal of 2151200235421 is 1245320021512.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 2151200235421 - 2¹ = 2151200235419 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 2151200235421.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2151200236421) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4273605 + ... + 4750378.

It is an arithmetic number, because the mean of its divisors is an integer number (270358560640).

Almost surely, 2^{2151200235421} is an apocalyptic number.

It is an amenable number.

2151200235421 is a deficient number, since it is larger than the sum of its proper divisors (11668249699).

2151200235421 is a wasteful number, since it uses less digits than its factorization.

2151200235421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9025275.

The product of its (nonzero) digits is 4800, while the sum is 28.

Adding to 2151200235421 its reverse (1245320021512), we get a palindrome (3396520256933).

The spelling of 2151200235421 in words is "two trillion, one hundred fifty-one billion, two hundred million, two hundred thirty-five thousand, four hundred twenty-one".