21112121022007 has 2 divisors, whose sum is σ = 21112121022008. Its totient is φ = 21112121022006.

The previous prime is 21112121021989. The next prime is 21112121022049. The reversal of 21112121022007 is 70022012121112.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 21112121022007 - 2¹⁹ = 21112120497719 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21112121022907) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10556060511003 + 10556060511004.

It is an arithmetic number, because the mean of its divisors is an integer number (10556060511004).

Almost surely, 2^{21112121022007} is an apocalyptic number.

21112121022007 is a deficient number, since it is larger than the sum of its proper divisors (1).

21112121022007 is an equidigital number, since it uses as much as digits as its factorization.

21112121022007 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 224, while the sum is 22.

Adding to 21112121022007 its reverse (70022012121112), we get a palindrome (91134133143119).

The spelling of 21112121022007 in words is "twenty-one trillion, one hundred twelve billion, one hundred twenty-one million, twenty-two thousand, seven".