2102000021437 has 2 divisors, whose sum is σ = 2102000021438. Its totient is φ = 2102000021436.

The previous prime is 2102000021431. The next prime is 2102000021461. The reversal of 2102000021437 is 7341200002012.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1723388702841 + 378611318596 = 1312779^2 + 615314^2 .

It is a cyclic number.

It is not a de Polignac number, because 2102000021437 - 2¹¹ = 2102000019389 is a prime.

It is a super-2 number, since 2×2102000021437² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2102000021431) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1051000010718 + 1051000010719.

It is an arithmetic number, because the mean of its divisors is an integer number (1051000010719).

Almost surely, 2^{2102000021437} is an apocalyptic number.

It is an amenable number.

2102000021437 is a deficient number, since it is larger than the sum of its proper divisors (1).

2102000021437 is an equidigital number, since it uses as much as digits as its factorization.

2102000021437 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 672, while the sum is 22.

Adding to 2102000021437 its reverse (7341200002012), we get a palindrome (9443200023449).

The spelling of 2102000021437 in words is "two trillion, one hundred two billion, twenty-one thousand, four hundred thirty-seven".