100283151721 has 4 divisors (see below), whose sum is σ = 100286768512. Its totient is φ = 100279534932.

The previous prime is 100283151707. The next prime is 100283151733. The reversal of 100283151721 is 127151382001.

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, and also an emirpimes, since its reverse is a distinct semiprime: 127151382001 = 7 ⋅18164483143.

It is a cyclic number.

It is not a de Polignac number, because 100283151721 - 2⁹ = 100283151209 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (100283151781) 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, 1766481 + ... + 1822366.

It is an arithmetic number, because the mean of its divisors is an integer number (25071692128).

Almost surely, 2^100283151721 is an apocalyptic number.

It is an amenable number.

100283151721 is a deficient number, since it is larger than the sum of its proper divisors (3616791).

100283151721 is an equidigital number, since it uses as much as digits as its factorization.

100283151721 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3616790.

The product of its (nonzero) digits is 3360, while the sum is 31.

It can be divided in two parts, 100283 and 151721, that added together give a square (252004 = 502²).

The spelling of 100283151721 in words is "one hundred billion, two hundred eighty-three million, one hundred fifty-one thousand, seven hundred twenty-one".