2131021434 has 64 divisors (see below), whose sum is σ = 4631261184. Its totient is φ = 651092736.

The previous prime is 2131021411. The next prime is 2131021463. The reversal of 2131021434 is 4341201312.

It is a self number, because there is not a number n which added to its sum of digits gives 2131021434.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2468887 + ... + 2469749.

It is an arithmetic number, because the mean of its divisors is an integer number (72363456).

Almost surely, 2^2131021434 is an apocalyptic number.

2131021434 is an abundant number, since it is smaller than the sum of its proper divisors (2500239750).

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

2131021434 is a wasteful number, since it uses less digits than its factorization.

2131021434 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1491.

The product of its (nonzero) digits is 576, while the sum is 21.

The square root of 2131021434 is about 46162.9877066032. The cubic root of 2131021434 is about 1286.8539875853.

Adding to 2131021434 its reverse (4341201312), we get a palindrome (6472222746).

The spelling of 2131021434 in words is "two billion, one hundred thirty-one million, twenty-one thousand, four hundred thirty-four".