1010021020123 has 4 divisors (see below), whose sum is σ = 1010043209008. Its totient is φ = 1009998831240.

The previous prime is 1010021020117. The next prime is 1010021020139. The reversal of 1010021020123 is 3210201200101.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1010021020123 - 2²¹ = 1010018922971 is a prime.

It is a super-2 number, since 2×1010021020123² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1010021020103) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11026023 + ... + 11117248.

It is an arithmetic number, because the mean of its divisors is an integer number (252510802252).

Almost surely, 2^{1010021020123} is an apocalyptic number.

1010021020123 is a deficient number, since it is larger than the sum of its proper divisors (22188885).

1010021020123 is an equidigital number, since it uses as much as digits as its factorization.

1010021020123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22188884.

The product of its (nonzero) digits is 24, while the sum is 13.

Adding to 1010021020123 its reverse (3210201200101), we get a palindrome (4220222220224).

The spelling of 1010021020123 in words is "one trillion, ten billion, twenty-one million, twenty thousand, one hundred twenty-three".