1210213001 has 4 divisors (see below), whose sum is σ = 1211095812. Its totient is φ = 1209330192.

The previous prime is 1210212989. The next prime is 1210213003. The reversal of 1210213001 is 1003120121.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1003120121 = 29 ⋅34590349.

It can be written as a sum of positive squares in 2 ways, for example, as 805197376 + 405015625 = 28376^2 + 20125^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1210213001 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1210213003) 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, 439346 + ... + 442091.

It is an arithmetic number, because the mean of its divisors is an integer number (302773953).

Almost surely, 2^1210213001 is an apocalyptic number.

It is an amenable number.

1210213001 is a deficient number, since it is larger than the sum of its proper divisors (882811).

1210213001 is an equidigital number, since it uses as much as digits as its factorization.

1210213001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 882810.

The product of its (nonzero) digits is 12, while the sum is 11.

The square root of 1210213001 is about 34788.1158012330. The cubic root of 1210213001 is about 1065.6647604649.

Adding to 1210213001 its reverse (1003120121), we get a palindrome (2213333122).

The spelling of 1210213001 in words is "one billion, two hundred ten million, two hundred thirteen thousand, one".