120202012661 has 16 divisors (see below), whose sum is σ = 127228147200. Its totient is φ = 113247499968.

The previous prime is 120202012631. The next prime is 120202012663. The reversal of 120202012661 is 166210202021.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 120202012661 - 2⁶ = 120202012597 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 (120202012663) 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, 2644055 + ... + 2689131.

It is an arithmetic number, because the mean of its divisors is an integer number (7951759200).

Almost surely, 2^120202012661 is an apocalyptic number.

It is an amenable number.

120202012661 is a deficient number, since it is larger than the sum of its proper divisors (7026134539).

120202012661 is a wasteful number, since it uses less digits than its factorization.

120202012661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45868.

The product of its (nonzero) digits is 576, while the sum is 23.

Adding to 120202012661 its reverse (166210202021), we get a palindrome (286412214682).

The spelling of 120202012661 in words is "one hundred twenty billion, two hundred two million, twelve thousand, six hundred sixty-one".