1242281101 has 2 divisors, whose sum is σ = 1242281102. Its totient is φ = 1242281100.

The previous prime is 1242281071. The next prime is 1242281141. The reversal of 1242281101 is 1011822421.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 637613001 + 604668100 = 25251^2 + 24590^2 .

It is a cyclic number.

It is not a de Polignac number, because 1242281101 - 2⁷ = 1242280973 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1242281141) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 621140550 + 621140551.

It is an arithmetic number, because the mean of its divisors is an integer number (621140551).

Almost surely, 2^1242281101 is an apocalyptic number.

It is an amenable number.

1242281101 is a deficient number, since it is larger than the sum of its proper divisors (1).

1242281101 is an equidigital number, since it uses as much as digits as its factorization.

1242281101 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 256, while the sum is 22.

The square root of 1242281101 is about 35246.0082988131. The cubic root of 1242281101 is about 1074.9954500619.

The spelling of 1242281101 in words is "one billion, two hundred forty-two million, two hundred eighty-one thousand, one hundred one".