101221001051 has 2 divisors, whose sum is σ = 101221001052. Its totient is φ = 101221001050.

The previous prime is 101221000967. The next prime is 101221001069. The reversal of 101221001051 is 150100122101.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-101221001051 is a prime.

It is not a weakly prime, because it can be changed into another prime (101221201051) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 50610500525 + 50610500526.

It is an arithmetic number, because the mean of its divisors is an integer number (50610500526).

Almost surely, 2^101221001051 is an apocalyptic number.

101221001051 is a deficient number, since it is larger than the sum of its proper divisors (1).

101221001051 is an equidigital number, since it uses as much as digits as its factorization.

101221001051 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 20, while the sum is 14.

Adding to 101221001051 its reverse (150100122101), we get a palindrome (251321123152).

The spelling of 101221001051 in words is "one hundred one billion, two hundred twenty-one million, one thousand, fifty-one".