1212201001 has 8 divisors (see below), whose sum is σ = 1347352704. Its totient is φ = 1081207920.

The previous prime is 1212200999. The next prime is 1212201019. The reversal of 1212201001 is 1001022121.

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 1212201001 - 2¹ = 1212200999 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1212201041) 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, 1039041 + ... + 1040206.

It is an arithmetic number, because the mean of its divisors is an integer number (168419088).

Almost surely, 2^1212201001 is an apocalyptic number.

1212201001 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1212201001 is a deficient number, since it is larger than the sum of its proper divisors (135151703).

1212201001 is a wasteful number, since it uses less digits than its factorization.

1212201001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2079311.

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

The square root of 1212201001 is about 34816.6770528148. The cubic root of 1212201001 is about 1066.2479587853.

Adding to 1212201001 its reverse (1001022121), we get a palindrome (2213223122).

It can be divided in two parts, 121220 and 1001, that added together give a palindrome (122221).

The spelling of 1212201001 in words is "one billion, two hundred twelve million, two hundred one thousand, one".