1225055101 has 2 divisors, whose sum is σ = 1225055102. Its totient is φ = 1225055100.

The previous prime is 1225055099. The next prime is 1225055107. The reversal of 1225055101 is 1015505221.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1056315001 + 168740100 = 32501^2 + 12990^2 .

It is a cyclic number.

It is not a de Polignac number, because 1225055101 - 2¹ = 1225055099 is a prime.

It is a super-2 number, since 2×1225055101² = 3001520000972240402, which contains 22 as substring.

Together with 1225055099, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1225055107) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 612527550 + 612527551.

It is an arithmetic number, because the mean of its divisors is an integer number (612527551).

Almost surely, 2^1225055101 is an apocalyptic number.

It is an amenable number.

1225055101 is a deficient number, since it is larger than the sum of its proper divisors (1).

1225055101 is an equidigital number, since it uses as much as digits as its factorization.

1225055101 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 500, while the sum is 22.

The square root of 1225055101 is about 35000.7871482914. The cubic root of 1225055101 is about 1070.0035231491.

The spelling of 1225055101 in words is "one billion, two hundred twenty-five million, fifty-five thousand, one hundred one".