1011020123 has 2 divisors, whose sum is σ = 1011020124. Its totient is φ = 1011020122.

The previous prime is 1011020099. The next prime is 1011020137. The reversal of 1011020123 is 3210201101.

It is a strong prime.

It is an emirp because it is prime and its reverse (3210201101) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1011020123 - 2²⁶ = 943911259 is a prime.

It is a super-2 number, since 2×1011020123² = 2044323378221870258, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (1011020173) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 505510061 + 505510062.

It is an arithmetic number, because the mean of its divisors is an integer number (505510062).

Almost surely, 2^1011020123 is an apocalyptic number.

1011020123 is a deficient number, since it is larger than the sum of its proper divisors (1).

1011020123 is an equidigital number, since it uses as much as digits as its factorization.

1011020123 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 12, while the sum is 11.

The square root of 1011020123 is about 31796.5426265184. The cubic root of 1011020123 is about 1003.6599626645.

Adding to 1011020123 its reverse (3210201101), we get a palindrome (4221221224).

The spelling of 1011020123 in words is "one billion, eleven million, twenty thousand, one hundred twenty-three".