1011020221493 has 2 divisors, whose sum is σ = 1011020221494. Its totient is φ = 1011020221492.

The previous prime is 1011020221483. The next prime is 1011020221501. The reversal of 1011020221493 is 3941220201101.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 686276382724 + 324743838769 = 828418^2 + 569863^2 .

It is a cyclic number.

It is not a de Polignac number, because 1011020221493 - 2⁶ = 1011020221429 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1011020221403) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 505510110746 + 505510110747.

It is an arithmetic number, because the mean of its divisors is an integer number (505510110747).

Almost surely, 2^{1011020221493} is an apocalyptic number.

It is an amenable number.

1011020221493 is a deficient number, since it is larger than the sum of its proper divisors (1).

1011020221493 is an equidigital number, since it uses as much as digits as its factorization.

1011020221493 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 864, while the sum is 26.

Adding to 1011020221493 its reverse (3941220201101), we get a palindrome (4952240422594).

The spelling of 1011020221493 in words is "one trillion, eleven billion, twenty million, two hundred twenty-one thousand, four hundred ninety-three".