3117021621 has 16 divisors (see below), whose sum is σ = 5029144704. Its totient is φ = 1676381184.

The previous prime is 3117021619. The next prime is 3117021631. The reversal of 3117021621 is 1261207113.

It is not a de Polignac number, because 3117021621 - 2¹ = 3117021619 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 3117021591 and 3117021600.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3117021631) 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, 4365220 + ... + 4365933.

It is an arithmetic number, because the mean of its divisors is an integer number (314321544).

Almost surely, 2^3117021621 is an apocalyptic number.

It is an amenable number.

3117021621 is a deficient number, since it is larger than the sum of its proper divisors (1912123083).

3117021621 is a wasteful number, since it uses less digits than its factorization.

3117021621 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8731180.

The product of its (nonzero) digits is 504, while the sum is 24.

The square root of 3117021621 is about 55830.2930406065. The cubic root of 3117021621 is about 1460.7635995880.

Adding to 3117021621 its reverse (1261207113), we get a palindrome (4378228734).

The spelling of 3117021621 in words is "three billion, one hundred seventeen million, twenty-one thousand, six hundred twenty-one".