1021203421157 has 2 divisors, whose sum is σ = 1021203421158. Its totient is φ = 1021203421156.

The previous prime is 1021203421097. The next prime is 1021203421159. The reversal of 1021203421157 is 7511243021201.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 908378641921 + 112824779236 = 953089^2 + 335894^2 .

It is an emirp because it is prime and its reverse (7511243021201) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1021203421157 is a prime.

It is a super-2 number, since 2×1021203421157² (a number of 25 digits) contains 22 as substring.

Together with 1021203421159, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1021203421159) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 510601710578 + 510601710579.

It is an arithmetic number, because the mean of its divisors is an integer number (510601710579).

Almost surely, 2^{1021203421157} is an apocalyptic number.

It is an amenable number.

1021203421157 is a deficient number, since it is larger than the sum of its proper divisors (1).

1021203421157 is an equidigital number, since it uses as much as digits as its factorization.

1021203421157 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3360, while the sum is 29.

Adding to 1021203421157 its reverse (7511243021201), we get a palindrome (8532446442358).

The spelling of 1021203421157 in words is "one trillion, twenty-one billion, two hundred three million, four hundred twenty-one thousand, one hundred fifty-seven".