1220202222157 has 2 divisors, whose sum is σ = 1220202222158. Its totient is φ = 1220202222156.

The previous prime is 1220202222119. The next prime is 1220202222181. The reversal of 1220202222157 is 7512222020221.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 774451040841 + 445751181316 = 880029^2 + 667646^2 .

It is an emirp because it is prime and its reverse (7512222020221) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1220202222157 is a prime.

It is a super-3 number, since 3×1220202222157³ (a number of 37 digits) contains 333 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1220202220157) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 610101111078 + 610101111079.

It is an arithmetic number, because the mean of its divisors is an integer number (610101111079).

Almost surely, 2^{1220202222157} is an apocalyptic number.

It is an amenable number.

1220202222157 is a deficient number, since it is larger than the sum of its proper divisors (1).

1220202222157 is an equidigital number, since it uses as much as digits as its factorization.

1220202222157 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4480, while the sum is 28.

Adding to 1220202222157 its reverse (7512222020221), we get a palindrome (8732424242378).

The spelling of 1220202222157 in words is "one trillion, two hundred twenty billion, two hundred two million, two hundred twenty-two thousand, one hundred fifty-seven".