1210222020157 has 2 divisors, whose sum is σ = 1210222020158. Its totient is φ = 1210222020156.

The previous prime is 1210222020131. The next prime is 1210222020173. The reversal of 1210222020157 is 7510202220121.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 860569773561 + 349652246596 = 927669^2 + 591314^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1210222020157 is a prime.

It is a super-2 number, since 2×1210222020157² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1210222020107) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 605111010078 + 605111010079.

It is an arithmetic number, because the mean of its divisors is an integer number (605111010079).

Almost surely, 2^{1210222020157} is an apocalyptic number.

It is an amenable number.

1210222020157 is a deficient number, since it is larger than the sum of its proper divisors (1).

1210222020157 is an equidigital number, since it uses as much as digits as its factorization.

1210222020157 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1120, while the sum is 25.

Adding to 1210222020157 its reverse (7510202220121), we get a palindrome (8720424240278).

The spelling of 1210222020157 in words is "one trillion, two hundred ten billion, two hundred twenty-two million, twenty thousand, one hundred fifty-seven".