1020120020021 has 8 divisors (see below), whose sum is σ = 1028154581760. Its totient is φ = 1012093986528.

The previous prime is 1020120019999. The next prime is 1020120020077. The reversal of 1020120020021 is 1200200210201.

It is a happy number.

1020120020021 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1020120020021 - 2⁶ = 1020120019957 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1020120019984 and 1020120020011.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1020120026021) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1891781 + ... + 2370458.

It is an arithmetic number, because the mean of its divisors is an integer number (128519322720).

Almost surely, 2^{1020120020021} is an apocalyptic number.

It is an amenable number.

1020120020021 is a deficient number, since it is larger than the sum of its proper divisors (8034561739).

1020120020021 is a wasteful number, since it uses less digits than its factorization.

1020120020021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4264123.

The product of its (nonzero) digits is 16, while the sum is 11.

Adding to 1020120020021 its reverse (1200200210201), we get a palindrome (2220320230222).

The spelling of 1020120020021 in words is "one trillion, twenty billion, one hundred twenty million, twenty thousand, twenty-one".