120221121021 has 16 divisors (see below), whose sum is σ = 163046713920. Its totient is φ = 78772055040.

The previous prime is 120221121017. The next prime is 120221121061. The reversal of 120221121021 is 120121122021.

It is not a de Polignac number, because 120221121021 - 2² = 120221121017 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (120221121061) 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, 781341 + ... + 922461.

It is an arithmetic number, because the mean of its divisors is an integer number (10190419620).

Almost surely, 2^120221121021 is an apocalyptic number.

It is an amenable number.

120221121021 is a deficient number, since it is larger than the sum of its proper divisors (42825592899).

120221121021 is a wasteful number, since it uses less digits than its factorization.

120221121021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 145996.

The product of its (nonzero) digits is 32, while the sum is 15.

Adding to 120221121021 its reverse (120121122021), we get a palindrome (240342243042).

The spelling of 120221121021 in words is "one hundred twenty billion, two hundred twenty-one million, one hundred twenty-one thousand, twenty-one".