1020020123623 has 2 divisors, whose sum is σ = 1020020123624. Its totient is φ = 1020020123622.

The previous prime is 1020020123467. The next prime is 1020020123657. The reversal of 1020020123623 is 3263210200201.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1020020123623 is a prime.

It is a super-2 number, since 2×1020020123623² (a number of 25 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1020020123594 and 1020020123603.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1020020153623) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (31) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 510010061811 + 510010061812.

It is an arithmetic number, because the mean of its divisors is an integer number (510010061812).

Almost surely, 2^{1020020123623} is an apocalyptic number.

1020020123623 is a deficient number, since it is larger than the sum of its proper divisors (1).

1020020123623 is an equidigital number, since it uses as much as digits as its factorization.

1020020123623 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 864, while the sum is 22.

Adding to 1020020123623 its reverse (3263210200201), we get a palindrome (4283230323824).

The spelling of 1020020123623 in words is "one trillion, twenty billion, twenty million, one hundred twenty-three thousand, six hundred twenty-three".