1020211120381 has 2 divisors, whose sum is σ = 1020211120382. Its totient is φ = 1020211120380.

The previous prime is 1020211120321. The next prime is 1020211120429. The reversal of 1020211120381 is 1830211120201.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 872993104281 + 147218016100 = 934341^2 + 383690^2 .

It is a cyclic number.

It is not a de Polignac number, because 1020211120381 - 2¹³ = 1020211112189 is a prime.

It is a super-2 number, since 2×1020211120381² (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 (1020211120321) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 510105560190 + 510105560191.

It is an arithmetic number, because the mean of its divisors is an integer number (510105560191).

Almost surely, 2^{1020211120381} is an apocalyptic number.

It is an amenable number.

1020211120381 is a deficient number, since it is larger than the sum of its proper divisors (1).

1020211120381 is an equidigital number, since it uses as much as digits as its factorization.

1020211120381 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 192, while the sum is 22.

Adding to 1020211120381 its reverse (1830211120201), we get a palindrome (2850422240582).

The spelling of 1020211120381 in words is "one trillion, twenty billion, two hundred eleven million, one hundred twenty thousand, three hundred eighty-one".