3121102040 has 96 divisors (see below), whose sum is σ = 8368466400. Its totient is φ = 1043965440.

The previous prime is 3121101943. The next prime is 3121102043. The reversal of 3121102040 is 402011213.

It is a Harshad number since it is a multiple of its sum of digits (14).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3121102043) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 60941 + ... + 99779.

It is an arithmetic number, because the mean of its divisors is an integer number (87171525).

Almost surely, 2^3121102040 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 3121102040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (4184233200).

3121102040 is an abundant number, since it is smaller than the sum of its proper divisors (5247364360).

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

3121102040 is a wasteful number, since it uses less digits than its factorization.

3121102040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38905 (or 38894 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 14.

The square root of 3121102040 is about 55866.8241445672. The cubic root of 3121102040 is about 1461.4007386299.

Adding to 3121102040 its reverse (402011213), we get a palindrome (3523113253).

The spelling of 3121102040 in words is "three billion, one hundred twenty-one million, one hundred two thousand, forty".