216101421461 has 4 divisors (see below), whose sum is σ = 216392272032. Its totient is φ = 215810570892.

The previous prime is 216101421443. The next prime is 216101421467. The reversal of 216101421461 is 164124101612.

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 a de Polignac number, because none of the positive numbers 2^k-216101421461 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (216101421467) 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, 145424171 + ... + 145425656.

It is an arithmetic number, because the mean of its divisors is an integer number (54098068008).

Almost surely, 2^216101421461 is an apocalyptic number.

It is an amenable number.

216101421461 is a deficient number, since it is larger than the sum of its proper divisors (290850571).

216101421461 is an equidigital number, since it uses as much as digits as its factorization.

216101421461 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 290850570.

The product of its (nonzero) digits is 2304, while the sum is 29.

The spelling of 216101421461 in words is "two hundred sixteen billion, one hundred one million, four hundred twenty-one thousand, four hundred sixty-one".