1200211001 has 16 divisors (see below), whose sum is σ = 1367912448. Its totient is φ = 1042390800.

The previous prime is 1200210983. The next prime is 1200211003. The reversal of 1200211001 is 1001120021.

It is not a de Polignac number, because 1200211001 - 2¹⁰ = 1200209977 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1200211001.

It is not an unprimeable number, because it can be changed into a prime (1200211003) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 248330 + ... + 253116.

It is an arithmetic number, because the mean of its divisors is an integer number (85494528).

Almost surely, 2^1200211001 is an apocalyptic number.

1200211001 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1200211001 is a deficient number, since it is larger than the sum of its proper divisors (167701447).

1200211001 is a wasteful number, since it uses less digits than its factorization.

1200211001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5812.

The product of its (nonzero) digits is 4, while the sum is 8.

The square root of 1200211001 is about 34644.0615546157. The cubic root of 1200211001 is about 1062.7208494271.

Adding to 1200211001 its reverse (1001120021), we get a palindrome (2201331022).

It can be divided in two parts, 120021 and 1001, that multiplied together give a palindrome (120141021).

The spelling of 1200211001 in words is "one billion, two hundred million, two hundred eleven thousand, one".