120221001021 has 16 divisors (see below), whose sum is σ = 174906132480. Its totient is φ = 72844870320.

The previous prime is 120221001001. The next prime is 120221001023. The reversal of 120221001021 is 120100122021.

It is not a de Polignac number, because 120221001021 - 2³³ = 111631066429 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 120221000988 and 120221001006.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (120221001023) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 258381 + ... + 554258.

It is an arithmetic number, because the mean of its divisors is an integer number (10931633280).

Almost surely, 2^120221001021 is an apocalyptic number.

120221001021 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

120221001021 is a deficient number, since it is larger than the sum of its proper divisors (54685131459).

120221001021 is a wasteful number, since it uses less digits than its factorization.

120221001021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 817136.

The product of its (nonzero) digits is 16, while the sum is 12.

Adding to 120221001021 its reverse (120100122021), we get a palindrome (240321123042).

The spelling of 120221001021 in words is "one hundred twenty billion, two hundred twenty-one million, one thousand, twenty-one".