20100122051 has 2 divisors, whose sum is σ = 20100122052. Its totient is φ = 20100122050.

The previous prime is 20100121997. The next prime is 20100122069. The reversal of 20100122051 is 15022100102.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20100122051 is a prime.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (20100122071) 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 as a sum of consecutive naturals, namely, 10050061025 + 10050061026.

It is an arithmetic number, because the mean of its divisors is an integer number (10050061026).

Almost surely, 2^20100122051 is an apocalyptic number.

20100122051 is a deficient number, since it is larger than the sum of its proper divisors (1).

20100122051 is an equidigital number, since it uses as much as digits as its factorization.

20100122051 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 40, while the sum is 14.

Adding to 20100122051 its reverse (15022100102), we get a palindrome (35122222153).

The spelling of 20100122051 in words is "twenty billion, one hundred million, one hundred twenty-two thousand, fifty-one".