1021020223117 has 2 divisors, whose sum is σ = 1021020223118. Its totient is φ = 1021020223116.

The previous prime is 1021020223103. The next prime is 1021020223123. The reversal of 1021020223117 is 7113220201201.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 591351772036 + 429668451081 = 768994^2 + 655491^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1021020223117 is a prime.

It is a super-2 number, since 2×1021020223117² (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 (1021020220117) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 510510111558 + 510510111559.

It is an arithmetic number, because the mean of its divisors is an integer number (510510111559).

Almost surely, 2^{1021020223117} is an apocalyptic number.

It is an amenable number.

1021020223117 is a deficient number, since it is larger than the sum of its proper divisors (1).

1021020223117 is an equidigital number, since it uses as much as digits as its factorization.

1021020223117 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 336, while the sum is 22.

Adding to 1021020223117 its reverse (7113220201201), we get a palindrome (8134240424318).

The spelling of 1021020223117 in words is "one trillion, twenty-one billion, twenty million, two hundred twenty-three thousand, one hundred seventeen".