3121400142 has 192 divisors, whose sum is σ = 8450956800. Its totient is φ = 812747520.

The previous prime is 3121400131. The next prime is 3121400159. The reversal of 3121400142 is 2410041213.

3121400142 is a `hidden beast` number, since 3 + 121 + 400 + 142 = 666.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 11603584 + ... + 11603852.

It is an arithmetic number, because the mean of its divisors is an integer number (44015400).

Almost surely, 2^3121400142 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 3121400142, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (4225478400).

3121400142 is an abundant number, since it is smaller than the sum of its proper divisors (5329556658).

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

3121400142 is a wasteful number, since it uses less digits than its factorization.

3121400142 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 471 (or 468 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 18.

The square root of 3121400142 is about 55869.4920506711. The cubic root of 3121400142 is about 1461.4472641422.

Adding to 3121400142 its reverse (2410041213), we get a palindrome (5531441355).

The spelling of 3121400142 in words is "three billion, one hundred twenty-one million, four hundred thousand, one hundred forty-two".