1020212221157 has 2 divisors, whose sum is σ = 1020212221158. Its totient is φ = 1020212221156.

The previous prime is 1020212221079. The next prime is 1020212221169. The reversal of 1020212221157 is 7511222120201.

1020212221157 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 690811984801 + 329400236356 = 831151^2 + 573934^2 .

It is an emirp because it is prime and its reverse (7511222120201) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1020212221157 - 2⁸ = 1020212220901 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1020212521157) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 510106110578 + 510106110579.

It is an arithmetic number, because the mean of its divisors is an integer number (510106110579).

Almost surely, 2^{1020212221157} is an apocalyptic number.

It is an amenable number.

1020212221157 is a deficient number, since it is larger than the sum of its proper divisors (1).

1020212221157 is an equidigital number, since it uses as much as digits as its factorization.

1020212221157 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1120, while the sum is 26.

Adding to 1020212221157 its reverse (7511222120201), we get a palindrome (8531434341358).

The spelling of 1020212221157 in words is "one trillion, twenty billion, two hundred twelve million, two hundred twenty-one thousand, one hundred fifty-seven".