1616100121 has 8 divisors (see below), whose sum is σ = 1713618504. Its totient is φ = 1518854400.

The previous prime is 1616100071. The next prime is 1616100127. The reversal of 1616100121 is 1210016161.

It can be written as a sum of positive squares in 4 ways, for example, as 1094617225 + 521482896 = 33085^2 + 22836^2 .

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 1616100121 - 2¹¹ = 1616098073 is a prime.

It is a super-2 number, since 2×1616100121² = 5223559202192429282, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1616100127) 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, 55890 + ... + 79723.

It is an arithmetic number, because the mean of its divisors is an integer number (214202313).

Almost surely, 2^1616100121 is an apocalyptic number.

It is an amenable number.

1616100121 is a deficient number, since it is larger than the sum of its proper divisors (97518383).

1616100121 is a wasteful number, since it uses less digits than its factorization.

1616100121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 136331.

The product of its (nonzero) digits is 72, while the sum is 19.

The square root of 1616100121 is about 40200.7477666772. The cubic root of 1616100121 is about 1173.5170961878.

Adding to 1616100121 its reverse (1210016161), we get a palindrome (2826116282).

The spelling of 1616100121 in words is "one billion, six hundred sixteen million, one hundred thousand, one hundred twenty-one".