21122102100007 has 2 divisors, whose sum is σ = 21122102100008. Its totient is φ = 21122102100006.

The previous prime is 21122102099993. The next prime is 21122102100049. The reversal of 21122102100007 is 70000120122112.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21122102100007 is a prime.

It is a super-2 number, since 2×21122102100007² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21122102100097) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10561051050003 + 10561051050004.

It is an arithmetic number, because the mean of its divisors is an integer number (10561051050004).

Almost surely, 2^{21122102100007} is an apocalyptic number.

21122102100007 is a deficient number, since it is larger than the sum of its proper divisors (1).

21122102100007 is an equidigital number, since it uses as much as digits as its factorization.

21122102100007 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 112, while the sum is 19.

Adding to 21122102100007 its reverse (70000120122112), we get a palindrome (91122222222119).

The spelling of 21122102100007 in words is "twenty-one trillion, one hundred twenty-two billion, one hundred two million, one hundred thousand, seven".