1020211000123 has 4 divisors (see below), whose sum is σ = 1165955428720. Its totient is φ = 874466571528.

The previous prime is 1020211000121. The next prime is 1020211000139. The reversal of 1020211000123 is 3210001120201.

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 1020211000123 - 2¹ = 1020211000121 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1020211000121) 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, 72872214288 + ... + 72872214301.

It is an arithmetic number, because the mean of its divisors is an integer number (291488857180).

Almost surely, 2^{1020211000123} is an apocalyptic number.

1020211000123 is a deficient number, since it is larger than the sum of its proper divisors (145744428597).

1020211000123 is an equidigital number, since it uses as much as digits as its factorization.

1020211000123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 145744428596.

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

Adding to 1020211000123 its reverse (3210001120201), we get a palindrome (4230212120324).

The spelling of 1020211000123 in words is "one trillion, twenty billion, two hundred eleven million, one hundred twenty-three", and thus it is an aban number.