1010120020021 has 4 divisors (see below), whose sum is σ = 1154422880032. Its totient is φ = 865817160012.

The previous prime is 1010120019977. The next prime is 1010120020027. The reversal of 1010120020021 is 1200200210101.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a de Polignac number, because none of the positive numbers 2^k-1010120020021 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1010120020027) 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, 72151429995 + ... + 72151430008.

It is an arithmetic number, because the mean of its divisors is an integer number (288605720008).

Almost surely, 2^{1010120020021} is an apocalyptic number.

It is an amenable number.

1010120020021 is a deficient number, since it is larger than the sum of its proper divisors (144302860011).

1010120020021 is an equidigital number, since it uses as much as digits as its factorization.

1010120020021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 144302860010.

The product of its (nonzero) digits is 8, while the sum is 10.

Adding to 1010120020021 its reverse (1200200210101), we get a palindrome (2210320230122).

The spelling of 1010120020021 in words is "one trillion, ten billion, one hundred twenty million, twenty thousand, twenty-one".