20120201102009 has 2 divisors, whose sum is σ = 20120201102010. Its totient is φ = 20120201102008.

The previous prime is 20120201101951. The next prime is 20120201102039. The reversal of 20120201102009 is 90020110202102.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 17659930426384 + 2460270675625 = 4202372^2 + 1568525^2 .

It is a cyclic number.

It is not a de Polignac number, because 20120201102009 - 2²⁸ = 20119932666553 is a prime.

It is not a weakly prime, because it can be changed into another prime (20120201102039) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10060100551004 + 10060100551005.

It is an arithmetic number, because the mean of its divisors is an integer number (10060100551005).

Almost surely, 2^{20120201102009} is an apocalyptic number.

It is an amenable number.

20120201102009 is a deficient number, since it is larger than the sum of its proper divisors (1).

20120201102009 is an equidigital number, since it uses as much as digits as its factorization.

20120201102009 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 144, while the sum is 20.

The spelling of 20120201102009 in words is "twenty trillion, one hundred twenty billion, two hundred one million, one hundred two thousand, nine".