1020000221231 has 2 divisors, whose sum is σ = 1020000221232. Its totient is φ = 1020000221230.

The previous prime is 1020000221147. The next prime is 1020000221291. The reversal of 1020000221231 is 1321220000201.

It is a happy number.

It is a strong prime.

It is an emirp because it is prime and its reverse (1321220000201) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1020000221231 - 2³⁰ = 1018926479407 is a prime.

It is a super-2 number, since 2×1020000221231² (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 (1020000221291) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 510000110615 + 510000110616.

It is an arithmetic number, because the mean of its divisors is an integer number (510000110616).

Almost surely, 2^{1020000221231} is an apocalyptic number.

1020000221231 is a deficient number, since it is larger than the sum of its proper divisors (1).

1020000221231 is an equidigital number, since it uses as much as digits as its factorization.

1020000221231 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 48, while the sum is 14.

Adding to 1020000221231 its reverse (1321220000201), we get a palindrome (2341220221432).

The spelling of 1020000221231 in words is "one trillion, twenty billion, two hundred twenty-one thousand, two hundred thirty-one".