2131220001 has 8 divisors (see below), whose sum is σ = 2841868224. Its totient is φ = 1420692560.

The previous prime is 2131219999. The next prime is 2131220009. The reversal of 2131220001 is 1000221312.

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 2131220001 - 2¹ = 2131219999 is a prime.

It is not an unprimeable number, because it can be changed into a prime (2131220009) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 25831 + ... + 70211.

It is an arithmetic number, because the mean of its divisors is an integer number (355233528).

Almost surely, 2^2131220001 is an apocalyptic number.

It is an amenable number.

2131220001 is a deficient number, since it is larger than the sum of its proper divisors (710648223).

2131220001 is a wasteful number, since it uses less digits than its factorization.

2131220001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 60391.

The product of its (nonzero) digits is 24, while the sum is 12.

The square root of 2131220001 is about 46165.1383730191. The cubic root of 2131220001 is about 1286.8939557113.

Adding to 2131220001 its reverse (1000221312), we get a palindrome (3131441313).

The spelling of 2131220001 in words is "two billion, one hundred thirty-one million, two hundred twenty thousand, one".