1210012021 has 8 divisors (see below), whose sum is σ = 1217317464. Its totient is φ = 1202718720.

The previous prime is 1210012007. The next prime is 1210012051. The reversal of 1210012021 is 1202100121.

It can be written as a sum of positive squares in 4 ways, for example, as 27615025 + 1182396996 = 5255^2 + 34386^2 .

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 1210012021 - 2¹¹ = 1210009973 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1210011989 and 1210012007.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1210012051) 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, 265861 + ... + 270373.

It is an arithmetic number, because the mean of its divisors is an integer number (152164683).

Almost surely, 2^1210012021 is an apocalyptic number.

It is an amenable number.

1210012021 is a deficient number, since it is larger than the sum of its proper divisors (7305443).

1210012021 is a wasteful number, since it uses less digits than its factorization.

1210012021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6071.

The product of its (nonzero) digits is 8, while the sum is 10.

The square root of 1210012021 is about 34785.2270511492. The cubic root of 1210012021 is about 1065.6057655716.

Adding to 1210012021 its reverse (1202100121), we get a palindrome (2412112142).

The spelling of 1210012021 in words is "one billion, two hundred ten million, twelve thousand, twenty-one".