1210001002 has 24 divisors (see below), whose sum is σ = 2145950820. Its totient is φ = 510068160.

The previous prime is 1210000999. The next prime is 1210001003. The reversal of 1210001002 is 2001000121.

It can be written as a sum of positive squares in 2 ways, for example, as 1051769761 + 158231241 = 32431^2 + 12579^2 .

It is a Harshad number since it is a multiple of its sum of digits (7).

It is not an unprimeable number, because it can be changed into a prime (1210001003) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 95227 + ... + 107182.

Almost surely, 2^1210001002 is an apocalyptic number.

1210001002 is a deficient number, since it is larger than the sum of its proper divisors (935949818).

1210001002 is a wasteful number, since it uses less digits than its factorization.

1210001002 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 202486 (or 202479 counting only the distinct ones).

The product of its (nonzero) digits is 4, while the sum is 7.

The square root of 1210001002 is about 34785.0686645865. The cubic root of 1210001002 is about 1065.6025309080.

Adding to 1210001002 its reverse (2001000121), we get a palindrome (3211001123).

The spelling of 1210001002 in words is "one billion, two hundred ten million, one thousand, two".