1381212001 has 8 divisors (see below), whose sum is σ = 1487870720. Its totient is φ = 1274612112.

The previous prime is 1381211999. The next prime is 1381212013. The reversal of 1381212001 is 1002121831.

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 1381212001 - 2¹ = 1381211999 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 1381212001.

It is not an unprimeable number, because it can be changed into a prime (1381212071) 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, 42256 + ... + 67438.

It is an arithmetic number, because the mean of its divisors is an integer number (185983840).

Almost surely, 2^1381212001 is an apocalyptic number.

It is an amenable number.

1381212001 is a deficient number, since it is larger than the sum of its proper divisors (106658719).

1381212001 is a wasteful number, since it uses less digits than its factorization.

1381212001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29415.

The product of its (nonzero) digits is 96, while the sum is 19.

The square root of 1381212001 is about 37164.6606469103. The cubic root of 1381212001 is about 1113.6621196484.

Adding to 1381212001 its reverse (1002121831), we get a palindrome (2383333832).

The spelling of 1381212001 in words is "one billion, three hundred eighty-one million, two hundred twelve thousand, one".