154200216132421 has 4 divisors (see below), whose sum is σ = 154291082496012. Its totient is φ = 154109349768832.

The previous prime is 154200216132299. The next prime is 154200216132433. The reversal of 154200216132421 is 124231612002451.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 150010784956321 + 4189431176100 = 12247889^2 + 2046810^2 .

It is a cyclic number.

It is not a de Polignac number, because 154200216132421 - 2³¹ = 154198068648773 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (154200216133421) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 45433179250 + ... + 45433182643.

It is an arithmetic number, because the mean of its divisors is an integer number (38572770624003).

Almost surely, 2^{154200216132421} is an apocalyptic number.

It is an amenable number.

154200216132421 is a deficient number, since it is larger than the sum of its proper divisors (90866363591).

154200216132421 is an equidigital number, since it uses as much as digits as its factorization.

154200216132421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 90866363590.

The product of its (nonzero) digits is 23040, while the sum is 34.

Adding to 154200216132421 its reverse (124231612002451), we get a palindrome (278431828134872).

The spelling of 154200216132421 in words is "one hundred fifty-four trillion, two hundred billion, two hundred sixteen million, one hundred thirty-two thousand, four hundred twenty-one".