1610012021 has 4 divisors (see below), whose sum is σ = 1630392000. Its totient is φ = 1589632044.

The previous prime is 1610012017. The next prime is 1610012051. The reversal of 1610012021 is 1202100161.

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: 1202100161 = 59 ⋅20374579.

It is a cyclic number.

It is not a de Polignac number, because 1610012021 - 2² = 1610012017 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1610011987 and 1610012005.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1610012051) 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, 10189871 + ... + 10190028.

It is an arithmetic number, because the mean of its divisors is an integer number (407598000).

Almost surely, 2^1610012021 is an apocalyptic number.

It is an amenable number.

1610012021 is a deficient number, since it is larger than the sum of its proper divisors (20379979).

1610012021 is an equidigital number, since it uses as much as digits as its factorization.

1610012021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20379978.

The product of its (nonzero) digits is 24, while the sum is 14.

The square root of 1610012021 is about 40124.9550903175. The cubic root of 1610012021 is about 1172.0416348533.

Adding to 1610012021 its reverse (1202100161), we get a palindrome (2812112182).

The spelling of 1610012021 in words is "one billion, six hundred ten million, twelve thousand, twenty-one".