1220235101 has 2 divisors, whose sum is σ = 1220235102. Its totient is φ = 1220235100.

The previous prime is 1220235097. The next prime is 1220235127. The reversal of 1220235101 is 1015320221.

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., 848323876 + 371911225 = 29126^2 + 19285^2 .

It is an emirp because it is prime and its reverse (1015320221) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1220235101 - 2² = 1220235097 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1220235101.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1220235131) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 610117550 + 610117551.

It is an arithmetic number, because the mean of its divisors is an integer number (610117551).

Almost surely, 2^1220235101 is an apocalyptic number.

It is an amenable number.

1220235101 is a deficient number, since it is larger than the sum of its proper divisors (1).

1220235101 is an equidigital number, since it uses as much as digits as its factorization.

1220235101 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 120, while the sum is 17.

The square root of 1220235101 is about 34931.8636920506. The cubic root of 1220235101 is about 1068.5983630104.

Adding to 1220235101 its reverse (1015320221), we get a palindrome (2235555322).

The spelling of 1220235101 in words is "one billion, two hundred twenty million, two hundred thirty-five thousand, one hundred one".