20111220007 has 2 divisors, whose sum is σ = 20111220008. Its totient is φ = 20111220006.

The previous prime is 20111219981. The next prime is 20111220061. The reversal of 20111220007 is 70002211102.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 20111220007 - 2⁷ = 20111219879 is a prime.

It is a super-2 number, since 2×20111220007² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20111220097) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10055610003 + 10055610004.

It is an arithmetic number, because the mean of its divisors is an integer number (10055610004).

Almost surely, 2^20111220007 is an apocalyptic number.

20111220007 is a deficient number, since it is larger than the sum of its proper divisors (1).

20111220007 is an equidigital number, since it uses as much as digits as its factorization.

20111220007 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 56, while the sum is 16.

Adding to 20111220007 its reverse (70002211102), we get a palindrome (90113431109).

The spelling of 20111220007 in words is "twenty billion, one hundred eleven million, two hundred twenty thousand, seven".