102121222061 has 2 divisors, whose sum is σ = 102121222062. Its totient is φ = 102121222060.

The previous prime is 102121222057. The next prime is 102121222069. The reversal of 102121222061 is 160222121201.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 90989706025 + 11131516036 = 301645^2 + 105506^2 .

It is a cyclic number.

It is not a de Polignac number, because 102121222061 - 2² = 102121222057 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (102121222069) 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, 51060611030 + 51060611031.

It is an arithmetic number, because the mean of its divisors is an integer number (51060611031).

Almost surely, 2^102121222061 is an apocalyptic number.

It is an amenable number.

102121222061 is a deficient number, since it is larger than the sum of its proper divisors (1).

102121222061 is an equidigital number, since it uses as much as digits as its factorization.

102121222061 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 192, while the sum is 20.

Adding to 102121222061 its reverse (160222121201), we get a palindrome (262343343262).

The spelling of 102121222061 in words is "one hundred two billion, one hundred twenty-one million, two hundred twenty-two thousand, sixty-one".