1212002001 has 32 divisors (see below), whose sum is σ = 2160076800. Its totient is φ = 656119440.

The previous prime is 1212001981. The next prime is 1212002003. The reversal of 1212002001 is 1002002121.

1212002001 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 1212002001 - 2⁶ = 1212001937 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (9).

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (1212002003) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 165165 + ... + 172346.

It is an arithmetic number, because the mean of its divisors is an integer number (67502400).

Almost surely, 2^1212002001 is an apocalyptic number.

It is an amenable number.

1212002001 is a deficient number, since it is larger than the sum of its proper divisors (948074799).

1212002001 is a wasteful number, since it uses less digits than its factorization.

1212002001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 337546 (or 337540 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 9.

The square root of 1212002001 is about 34813.8191096582. The cubic root of 1212002001 is about 1066.1896090134.

Adding to 1212002001 its reverse (1002002121), we get a palindrome (2214004122).

It can be divided in two parts, 121200 and 2001, that added together give a square (123201 = 351²).

The spelling of 1212002001 in words is "one billion, two hundred twelve million, two thousand, one".