3961021610020 has 24 divisors (see below), whose sum is σ = 8755942507200. Its totient is φ = 1501018715232.

The previous prime is 3961021610017. The next prime is 3961021610027. The reversal of 3961021610020 is 200161201693.

It is not an unprimeable number, because it can be changed into a prime (3961021610027) 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, 5211870160 + ... + 5211870919.

It is an arithmetic number, because the mean of its divisors is an integer number (364830937800).

Almost surely, 2^{3961021610020} is an apocalyptic number.

It is an amenable number.

3961021610020 is an abundant number, since it is smaller than the sum of its proper divisors (4794920897180).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

3961021610020 is a wasteful number, since it uses less digits than its factorization.

3961021610020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10423741107 (or 10423741105 counting only the distinct ones).

The product of its (nonzero) digits is 3888, while the sum is 31.

The spelling of 3961021610020 in words is "three trillion, nine hundred sixty-one billion, twenty-one million, six hundred ten thousand, twenty".