100402221 has 16 divisors (see below), whose sum is σ = 141965568. Its totient is φ = 62899200.

The previous prime is 100402219. The next prime is 100402223. The reversal of 100402221 is 122204001.

It is an interprime number because it is at equal distance from previous prime (100402219) and next prime (100402223).

It is not a de Polignac number, because 100402221 - 2¹ = 100402219 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 100402197 and 100402206.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (100402223) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 45381 + ... + 47541.

It is an arithmetic number, because the mean of its divisors is an integer number (8872848).

Almost surely, 2^100402221 is an apocalyptic number.

It is an amenable number.

100402221 is a deficient number, since it is larger than the sum of its proper divisors (41563347).

100402221 is a wasteful number, since it uses less digits than its factorization.

100402221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3092.

The product of its (nonzero) digits is 32, while the sum is 12.

The square root of 100402221 is about 10020.0908678514. The cubic root of 100402221 is about 464.7803656945.

Adding to 100402221 its reverse (122204001), we get a palindrome (222606222).

The spelling of 100402221 in words is "one hundred million, four hundred two thousand, two hundred twenty-one".